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#1
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Gremlins and bikes!
Let's share stories of when Gremlins strike.
My latest is my Schwalbe 30mm CX Pro cyclocross tire. It has gone completely flat a couple of times lately. So, yesterday I took the tube out and pumped it up quite a bit to check it for pinholes. PAssed it numerous times under water in a large pan. No bubbles at all. Even checked the valve still no bubbles. Pumped up the tube more and left it to hang overnight. This morning it was still full of air. Let the air out and placed tube back under tire and mounted tire to the rim. Pumped it up to 80psi and went for a ride. Rode for a couple of hours and came home. Tire pressure still at 80psi. I can only conclude that there are Gremlins in my apartment and they let the air out of the tire. Note that the tire was completely flat not just soft. What have Gremlins done to your bike? Cheers |
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#2
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Gremlins and bikes!
On Monday, June 3, 2019 at 9:22:42 AM UTC-7, Sir Ridesalot wrote:
Let's share stories of when Gremlins strike. My latest is my Schwalbe 30mm CX Pro cyclocross tire. It has gone completely flat a couple of times lately. So, yesterday I took the tube out and pumped it up quite a bit to check it for pinholes. PAssed it numerous times under water in a large pan. No bubbles at all. Even checked the valve still no bubbles. Pumped up the tube more and left it to hang overnight. This morning it was still full of air. Let the air out and placed tube back under tire and mounted tire to the rim. Pumped it up to 80psi and went for a ride. Rode for a couple of hours and came home. Tire pressure still at 80psi. I can only conclude that there are Gremlins in my apartment and they let the air out of the tire. Note that the tire was completely flat not just soft. What have Gremlins done to your bike? Not a gremlin, but a WTF? My son was having shifting problems suggestive of worn cassettes, so I put on a new 10sp cassette that I had hanging around for the bike (a CAAD 9 that used to be mine). Shifted beautifully. We went for a ride, and the cassette was rattling like it was loose. It was -- and it needed a 1mm shim for the old 8/9 freehub body. It seemed fine when I put it together. So, I put in the shim, and it silenced the rattle. Oddly, there was no shim when I pulled the old cassettes, and I don't recall ever using one in the past -- at least not on a Shimano hub. Maybe I'm just getting addled. -- Jay Beattie. |
#3
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Gremlins and bikes!
On Mon, 3 Jun 2019 12:26:26 -0700 (PDT),
jbeattie wrote: On Monday, June 3, 2019 at 9:22:42 AM UTC-7, Sir Ridesalot wrote: Let's share stories of when Gremlins strike. My latest is my Schwalbe 30mm CX Pro cyclocross tire. It has gone completely flat a couple of times lately. So, yesterday I took the tube out and pumped it up quite a bit to check it for pinholes. PAssed it numerous times under water in a large pan. No bubbles at all. Even checked the valve still no bubbles. Pumped up the tube more and left it to hang overnight. This morning it was still full of air. Let the air out and placed tube back under tire and mounted tire to the rim. Pumped it up to 80psi and went for a ride. Rode for a couple of hours and came home. Tire pressure still at 80psi. I can only conclude that there are Gremlins in my apartment and they let the air out of the tire. Note that the tire was completely flat not just soft. What have Gremlins done to your bike? Not a gremlin, but a WTF? My son was having shifting problems suggestive of worn cassettes, so I put on a new 10sp cassette that I had hanging around for the bike (a CAAD 9 that used to be mine). Shifted beautifully. We went for a ride, and the cassette was rattling like it was loose. It was -- and it needed a 1mm shim for the old 8/9 freehub body. It seemed fine when I put it together. So, I put in the shim, and it silenced the rattle. Oddly, there was no shim when I pulled the old cassettes, and I don't recall ever using one in the past -- at least not on a Shimano hub. Maybe I'm just getting addled. This is too weird. We run a 10-speed Shimano cassette with a long throw Ultegra road derailer on our tandem. Two weeks ago the derailer body snapped, and I replaced it with a new part (same model). The shop also trued the wheel and adjusted the derailer hanger at the same time, though the hanger had been unaffected by the derailer breaking. Last weekend, we broke a rear spoke. I replaced the spoke, and touched up the true of the wheel. Yesterday we were out riding, and I realized I'd gotten the cable adjusted off by a gear. I tightened the cable enough to cover the full range of 10 cogs, and we then had some weird shifting problems. I gradually got the cable tension dialed in, but there was a spot or two going across the casette where the shifting just jumped, oor even auto shifted at times. After we got home, I took the wheel off to clean the cassette, and discovered the cogs were loose. I out on a brand new cassettte, and had the same looseness. How did this happen? The cassette and rear der had behaved beautifully for many many hundreds of miles. I got a spacer at the LBS, and the looseness is gone. Haven't ridden it yet, but it shifts fine in the stand, and I expect the same on the road. -- Ted Heise West Lafayette, IN, USA |
#4
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Gremlins and bikes!
On 6/9/2019 7:41 AM, Theodore Heise wrote:
On Mon, 3 Jun 2019 12:26:26 -0700 (PDT), jbeattie wrote: On Monday, June 3, 2019 at 9:22:42 AM UTC-7, Sir Ridesalot wrote: Let's share stories of when Gremlins strike. My latest is my Schwalbe 30mm CX Pro cyclocross tire. It has gone completely flat a couple of times lately. So, yesterday I took the tube out and pumped it up quite a bit to check it for pinholes. PAssed it numerous times under water in a large pan. No bubbles at all. Even checked the valve still no bubbles. Pumped up the tube more and left it to hang overnight. This morning it was still full of air. Let the air out and placed tube back under tire and mounted tire to the rim. Pumped it up to 80psi and went for a ride. Rode for a couple of hours and came home. Tire pressure still at 80psi. I can only conclude that there are Gremlins in my apartment and they let the air out of the tire. Note that the tire was completely flat not just soft. What have Gremlins done to your bike? Not a gremlin, but a WTF? My son was having shifting problems suggestive of worn cassettes, so I put on a new 10sp cassette that I had hanging around for the bike (a CAAD 9 that used to be mine). Shifted beautifully. We went for a ride, and the cassette was rattling like it was loose. It was -- and it needed a 1mm shim for the old 8/9 freehub body. It seemed fine when I put it together. So, I put in the shim, and it silenced the rattle. Oddly, there was no shim when I pulled the old cassettes, and I don't recall ever using one in the past -- at least not on a Shimano hub. Maybe I'm just getting addled. This is too weird. We run a 10-speed Shimano cassette with a long throw Ultegra road derailer on our tandem. Two weeks ago the derailer body snapped, and I replaced it with a new part (same model). The shop also trued the wheel and adjusted the derailer hanger at the same time, though the hanger had been unaffected by the derailer breaking. Last weekend, we broke a rear spoke. I replaced the spoke, and touched up the true of the wheel. Yesterday we were out riding, and I realized I'd gotten the cable adjusted off by a gear. I tightened the cable enough to cover the full range of 10 cogs, and we then had some weird shifting problems. I gradually got the cable tension dialed in, but there was a spot or two going across the casette where the shifting just jumped, oor even auto shifted at times. After we got home, I took the wheel off to clean the cassette, and discovered the cogs were loose. I out on a brand new cassettte, and had the same looseness. How did this happen? The cassette and rear der had behaved beautifully for many many hundreds of miles. I got a spacer at the LBS, and the looseness is gone. Haven't ridden it yet, but it shifts fine in the stand, and I expect the same on the road. Yes, Shimano Ten format cassettes (whether Shimano brand or not) use a 1mm spacer behind low gear. Sprockets loose on body is an amazingly common and annoying service error both at home and in some shops. Intermittent or inconsistent shifting, if yet unresolved, may well be a kinked gear wire, a fraying gear wire ( look in/near shifter!) or damaged casing (usually at first casing stop). -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#5
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Gremlins and bikes!
On Sunday, June 9, 2019 at 9:38:36 AM UTC-7, AMuzi wrote:
On 6/9/2019 7:41 AM, Theodore Heise wrote: On Mon, 3 Jun 2019 12:26:26 -0700 (PDT), jbeattie wrote: On Monday, June 3, 2019 at 9:22:42 AM UTC-7, Sir Ridesalot wrote: Let's share stories of when Gremlins strike. My latest is my Schwalbe 30mm CX Pro cyclocross tire. It has gone completely flat a couple of times lately. So, yesterday I took the tube out and pumped it up quite a bit to check it for pinholes. PAssed it numerous times under water in a large pan. No bubbles at all. Even checked the valve still no bubbles. Pumped up the tube more and left it to hang overnight. This morning it was still full of air. Let the air out and placed tube back under tire and mounted tire to the rim. Pumped it up to 80psi and went for a ride. Rode for a couple of hours and came home. Tire pressure still at 80psi. I can only conclude that there are Gremlins in my apartment and they let the air out of the tire. Note that the tire was completely flat not just soft. What have Gremlins done to your bike? Not a gremlin, but a WTF? My son was having shifting problems suggestive of worn cassettes, so I put on a new 10sp cassette that I had hanging around for the bike (a CAAD 9 that used to be mine). Shifted beautifully. We went for a ride, and the cassette was rattling like it was loose. It was -- and it needed a 1mm shim for the old 8/9 freehub body. It seemed fine when I put it together. So, I put in the shim, and it silenced the rattle. Oddly, there was no shim when I pulled the old cassettes, and I don't recall ever using one in the past -- at least not on a Shimano hub. Maybe I'm just getting addled. This is too weird. We run a 10-speed Shimano cassette with a long throw Ultegra road derailer on our tandem. Two weeks ago the derailer body snapped, and I replaced it with a new part (same model). The shop also trued the wheel and adjusted the derailer hanger at the same time, though the hanger had been unaffected by the derailer breaking. Last weekend, we broke a rear spoke. I replaced the spoke, and touched up the true of the wheel. Yesterday we were out riding, and I realized I'd gotten the cable adjusted off by a gear. I tightened the cable enough to cover the full range of 10 cogs, and we then had some weird shifting problems. I gradually got the cable tension dialed in, but there was a spot or two going across the casette where the shifting just jumped, oor even auto shifted at times. After we got home, I took the wheel off to clean the cassette, and discovered the cogs were loose. I out on a brand new cassettte, and had the same looseness. How did this happen? The cassette and rear der had behaved beautifully for many many hundreds of miles. I got a spacer at the LBS, and the looseness is gone. Haven't ridden it yet, but it shifts fine in the stand, and I expect the same on the road. Yes, Shimano Ten format cassettes (whether Shimano brand or not) use a 1mm spacer behind low gear. Sprockets loose on body is an amazingly common and annoying service error both at home and in some shops. Intermittent or inconsistent shifting, if yet unresolved, may well be a kinked gear wire, a fraying gear wire ( look in/near shifter!) or damaged casing (usually at first casing stop). Is it a product-generational thing? I don't remember using one before on 10sp. It might be because I was using a different set of wheels with a later generation freehub body (?). -- Jay Beattie. |
#6
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Gremlins and bikes!
On Sun, 9 Jun 2019 10:55:36 -0700 (PDT),
jbeattie wrote: On Sunday, June 9, 2019 at 9:38:36 AM UTC-7, AMuzi wrote: On 6/9/2019 7:41 AM, Theodore Heise wrote: On Mon, 3 Jun 2019 12:26:26 -0700 (PDT), jbeattie wrote: On Monday, June 3, 2019 at 9:22:42 AM UTC-7, Sir Ridesalot wrote: Let's share stories of when Gremlins strike. My latest is my Schwalbe 30mm CX Pro cyclocross tire. It has gone completely flat a couple of times lately. [with no cause found] What have Gremlins done to your bike? Not a gremlin, but a WTF? My son was having shifting problems suggestive of worn cassettes, so I put on a new 10sp cassette that I had hanging around for the bike (a CAAD 9 that used to be mine). Shifted beautifully. We went for a ride, and the cassette was rattling like it was loose. It was -- and it needed a 1mm shim for the old 8/9 freehub body. It seemed fine when I put it together. So, I put in the shim, and it silenced the rattle. Oddly, there was no shim when I pulled the old cassettes, and I don't recall ever using one in the past -- at least not on a Shimano hub. This is too weird. We run a 10-speed Shimano cassette with a long throw Ultegra road derailer on our tandem. Two weeks ago the derailer body snapped, and I replaced it with a new part (same model). The shop also trued the wheel and adjusted the derailer hanger at the same time, though the hanger had been unaffected by the derailer breaking. Last weekend, we broke a rear spoke. I replaced the spoke, and touched up the true of the wheel. Yesterday we were out riding, and I realized I'd gotten the cable adjusted off by a gear. I tightened the cable enough to cover the full range of 10 cogs, and we then had some weird shifting problems. I gradually got the cable tension dialed in, but there was a spot or two going across the casette where the shifting just jumped, oor even auto shifted at times. After we got home, I took the wheel off to clean the cassette, and discovered the cogs were loose. I out on a brand new cassettte, and had the same looseness. How did this happen? The cassette and rear der had behaved beautifully for many many hundreds of miles. I got a spacer at the LBS, and the looseness is gone. Haven't ridden it yet, but it shifts fine in the stand, and I expect the same on the road. Yes, Shimano Ten format cassettes (whether Shimano brand or not) use a 1mm spacer behind low gear. Sprockets loose on body is an amazingly common and annoying service error both at home and in some shops. Thanks, Andrew. The weird thing is I have zero memory of seeing any spacer when I took the cassette off, nor can I find one around my shop area. It worked fine before taking the cassette off to replace the spoke, so I suppose I didn't see and lost it. Intermittent or inconsistent shifting, if yet unresolved, may well be a kinked gear wire, a fraying gear wire ( look in/near shifter!) or damaged casing (usually at first casing stop). Yes, that also crossed my mind. I've most often seen it manifest as failed or greatly delayed shifting to smaller cogs because the added friction from a damaged wire or housing is more easily overcome when pulling the cable (i.e., shifting to a larger cog.) I don't think that's the problem here, but if it persists this will definitely be the next thing I look into. Is it a product-generational thing? I don't remember using one before on 10sp. It might be because I was using a different set of wheels with a later generation freehub body (?). Same here. I don't recall ever seeing a spacer under the cassette on this (or indeed any) Shimano component. -- Ted Heise West Lafayette, IN, USA |
#7
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Gremlins and bikes!
On 6/9/2019 12:55 PM, jbeattie wrote:
On Sunday, June 9, 2019 at 9:38:36 AM UTC-7, AMuzi wrote: On 6/9/2019 7:41 AM, Theodore Heise wrote: On Mon, 3 Jun 2019 12:26:26 -0700 (PDT), jbeattie wrote: On Monday, June 3, 2019 at 9:22:42 AM UTC-7, Sir Ridesalot wrote: Let's share stories of when Gremlins strike. My latest is my Schwalbe 30mm CX Pro cyclocross tire. It has gone completely flat a couple of times lately. So, yesterday I took the tube out and pumped it up quite a bit to check it for pinholes. PAssed it numerous times under water in a large pan. No bubbles at all. Even checked the valve still no bubbles. Pumped up the tube more and left it to hang overnight. This morning it was still full of air. Let the air out and placed tube back under tire and mounted tire to the rim. Pumped it up to 80psi and went for a ride. Rode for a couple of hours and came home. Tire pressure still at 80psi. I can only conclude that there are Gremlins in my apartment and they let the air out of the tire. Note that the tire was completely flat not just soft. What have Gremlins done to your bike? Not a gremlin, but a WTF? My son was having shifting problems suggestive of worn cassettes, so I put on a new 10sp cassette that I had hanging around for the bike (a CAAD 9 that used to be mine). Shifted beautifully. We went for a ride, and the cassette was rattling like it was loose. It was -- and it needed a 1mm shim for the old 8/9 freehub body. It seemed fine when I put it together. So, I put in the shim, and it silenced the rattle. Oddly, there was no shim when I pulled the old cassettes, and I don't recall ever using one in the past -- at least not on a Shimano hub. Maybe I'm just getting addled. This is too weird. We run a 10-speed Shimano cassette with a long throw Ultegra road derailer on our tandem. Two weeks ago the derailer body snapped, and I replaced it with a new part (same model). The shop also trued the wheel and adjusted the derailer hanger at the same time, though the hanger had been unaffected by the derailer breaking. Last weekend, we broke a rear spoke. I replaced the spoke, and touched up the true of the wheel. Yesterday we were out riding, and I realized I'd gotten the cable adjusted off by a gear. I tightened the cable enough to cover the full range of 10 cogs, and we then had some weird shifting problems. I gradually got the cable tension dialed in, but there was a spot or two going across the casette where the shifting just jumped, oor even auto shifted at times. After we got home, I took the wheel off to clean the cassette, and discovered the cogs were loose. I out on a brand new cassettte, and had the same looseness. How did this happen? The cassette and rear der had behaved beautifully for many many hundreds of miles. I got a spacer at the LBS, and the looseness is gone. Haven't ridden it yet, but it shifts fine in the stand, and I expect the same on the road. Yes, Shimano Ten format cassettes (whether Shimano brand or not) use a 1mm spacer behind low gear. Sprockets loose on body is an amazingly common and annoying service error both at home and in some shops. Intermittent or inconsistent shifting, if yet unresolved, may well be a kinked gear wire, a fraying gear wire ( look in/near shifter!) or damaged casing (usually at first casing stop). Is it a product-generational thing? I don't remember using one before on 10sp. It might be because I was using a different set of wheels with a later generation freehub body (?). -- Jay Beattie. With most bodies but not all bodies. Also 13t-start cassettes don't need the spacer -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#8
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Gremlins and bikes!
On 6/9/2019 1:12 PM, Theodore Heise wrote:
On Sun, 9 Jun 2019 10:55:36 -0700 (PDT), jbeattie wrote: On Sunday, June 9, 2019 at 9:38:36 AM UTC-7, AMuzi wrote: On 6/9/2019 7:41 AM, Theodore Heise wrote: On Mon, 3 Jun 2019 12:26:26 -0700 (PDT), jbeattie wrote: On Monday, June 3, 2019 at 9:22:42 AM UTC-7, Sir Ridesalot wrote: Let's share stories of when Gremlins strike. My latest is my Schwalbe 30mm CX Pro cyclocross tire. It has gone completely flat a couple of times lately. [with no cause found] What have Gremlins done to your bike? Not a gremlin, but a WTF? My son was having shifting problems suggestive of worn cassettes, so I put on a new 10sp cassette that I had hanging around for the bike (a CAAD 9 that used to be mine). Shifted beautifully. We went for a ride, and the cassette was rattling like it was loose. It was -- and it needed a 1mm shim for the old 8/9 freehub body. It seemed fine when I put it together. So, I put in the shim, and it silenced the rattle. Oddly, there was no shim when I pulled the old cassettes, and I don't recall ever using one in the past -- at least not on a Shimano hub. This is too weird. We run a 10-speed Shimano cassette with a long throw Ultegra road derailer on our tandem. Two weeks ago the derailer body snapped, and I replaced it with a new part (same model). The shop also trued the wheel and adjusted the derailer hanger at the same time, though the hanger had been unaffected by the derailer breaking. Last weekend, we broke a rear spoke. I replaced the spoke, and touched up the true of the wheel. Yesterday we were out riding, and I realized I'd gotten the cable adjusted off by a gear. I tightened the cable enough to cover the full range of 10 cogs, and we then had some weird shifting problems. I gradually got the cable tension dialed in, but there was a spot or two going across the casette where the shifting just jumped, oor even auto shifted at times. After we got home, I took the wheel off to clean the cassette, and discovered the cogs were loose. I out on a brand new cassettte, and had the same looseness. How did this happen? The cassette and rear der had behaved beautifully for many many hundreds of miles. I got a spacer at the LBS, and the looseness is gone. Haven't ridden it yet, but it shifts fine in the stand, and I expect the same on the road. Yes, Shimano Ten format cassettes (whether Shimano brand or not) use a 1mm spacer behind low gear. Sprockets loose on body is an amazingly common and annoying service error both at home and in some shops. Thanks, Andrew. The weird thing is I have zero memory of seeing any spacer when I took the cassette off, nor can I find one around my shop area. It worked fine before taking the cassette off to replace the spoke, so I suppose I didn't see and lost it. Intermittent or inconsistent shifting, if yet unresolved, may well be a kinked gear wire, a fraying gear wire ( look in/near shifter!) or damaged casing (usually at first casing stop). Yes, that also crossed my mind. I've most often seen it manifest as failed or greatly delayed shifting to smaller cogs because the added friction from a damaged wire or housing is more easily overcome when pulling the cable (i.e., shifting to a larger cog.) I don't think that's the problem here, but if it persists this will definitely be the next thing I look into. Is it a product-generational thing? I don't remember using one before on 10sp. It might be because I was using a different set of wheels with a later generation freehub body (?). Same here. I don't recall ever seeing a spacer under the cassette on this (or indeed any) Shimano component. It's an actual Shimano part. First result in web search: https://www.bike-discount.de/en/buy/...cassette-26559 -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#9
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Gremlins and bikes!
On Sunday, June 9, 2019 at 2:07:42 PM UTC-7, AMuzi wrote:
On 6/9/2019 1:12 PM, Theodore Heise wrote: On Sun, 9 Jun 2019 10:55:36 -0700 (PDT), jbeattie wrote: On Sunday, June 9, 2019 at 9:38:36 AM UTC-7, AMuzi wrote: On 6/9/2019 7:41 AM, Theodore Heise wrote: On Mon, 3 Jun 2019 12:26:26 -0700 (PDT), jbeattie wrote: On Monday, June 3, 2019 at 9:22:42 AM UTC-7, Sir Ridesalot wrote: Let's share stories of when Gremlins strike. My latest is my Schwalbe 30mm CX Pro cyclocross tire. It has gone completely flat a couple of times lately. [with no cause found] What have Gremlins done to your bike? Not a gremlin, but a WTF? My son was having shifting problems suggestive of worn cassettes, so I put on a new 10sp cassette that I had hanging around for the bike (a CAAD 9 that used to be mine). Shifted beautifully. We went for a ride, and the cassette was rattling like it was loose. It was -- and it needed a 1mm shim for the old 8/9 freehub body. It seemed fine when I put it together. So, I put in the shim, and it silenced the rattle. Oddly, there was no shim when I pulled the old cassettes, and I don't recall ever using one in the past -- at least not on a Shimano hub. This is too weird. We run a 10-speed Shimano cassette with a long throw Ultegra road derailer on our tandem. Two weeks ago the derailer body snapped, and I replaced it with a new part (same model). The shop also trued the wheel and adjusted the derailer hanger at the same time, though the hanger had been unaffected by the derailer breaking. Last weekend, we broke a rear spoke. I replaced the spoke, and touched up the true of the wheel. Yesterday we were out riding, and I realized I'd gotten the cable adjusted off by a gear. I tightened the cable enough to cover the full range of 10 cogs, and we then had some weird shifting problems. I gradually got the cable tension dialed in, but there was a spot or two going across the casette where the shifting just jumped, oor even auto shifted at times. After we got home, I took the wheel off to clean the cassette, and discovered the cogs were loose. I out on a brand new cassettte, and had the same looseness. How did this happen? The cassette and rear der had behaved beautifully for many many hundreds of miles. I got a spacer at the LBS, and the looseness is gone. Haven't ridden it yet, but it shifts fine in the stand, and I expect the same on the road. Yes, Shimano Ten format cassettes (whether Shimano brand or not) use a 1mm spacer behind low gear. Sprockets loose on body is an amazingly common and annoying service error both at home and in some shops. Thanks, Andrew. The weird thing is I have zero memory of seeing any spacer when I took the cassette off, nor can I find one around my shop area. It worked fine before taking the cassette off to replace the spoke, so I suppose I didn't see and lost it. Intermittent or inconsistent shifting, if yet unresolved, may well be a kinked gear wire, a fraying gear wire ( look in/near shifter!) or damaged casing (usually at first casing stop). Yes, that also crossed my mind. I've most often seen it manifest as failed or greatly delayed shifting to smaller cogs because the added friction from a damaged wire or housing is more easily overcome when pulling the cable (i.e., shifting to a larger cog.) I don't think that's the problem here, but if it persists this will definitely be the next thing I look into. Is it a product-generational thing? I don't remember using one before on 10sp. It might be because I was using a different set of wheels with a later generation freehub body (?). Same here. I don't recall ever seeing a spacer under the cassette on this (or indeed any) Shimano component. It's an actual Shimano part. First result in web search: https://www.bike-discount.de/en/buy/...cassette-26559 I think one actually came with my cassette. I was picking up junk off the floor of the garage where I worked on my son's bike, and near the plastic cassette-holder cone was a 1mm chrome spacer. I didn't even see it. When I re-fixed his bike, I went into the basement and grabbed a spacer. Live and learn. -- Jay Beattie. |
#10
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Gremlins and bikes!
On Sun, 09 Jun 2019 16:07:34 -0500,
AMuzi wrote: On 6/9/2019 1:12 PM, Theodore Heise wrote: On Sun, 9 Jun 2019 10:55:36 -0700 (PDT), jbeattie wrote: On Sunday, June 9, 2019 at 9:38:36 AM UTC-7, AMuzi wrote: On 6/9/2019 7:41 AM, Theodore Heise wrote: On Mon, 3 Jun 2019 12:26:26 -0700 (PDT), ...My son was having shifting problems suggestive of worn cassettes, so I put on a new 10sp cassette that I had hanging around for the bike (a CAAD 9 that used to be mine). Shifted beautifully. We went for a ride, and the cassette was rattling like it was loose. It was -- and it needed a 1mm shim for the old 8/9 freehub body. It seemed fine when I put it together. So, I put in the shim, and it silenced the rattle. Oddly, there was no shim when I pulled the old cassettes, and I don't recall ever using one in the past -- at least not on a Shimano hub. This is too weird. We run a 10-speed Shimano cassette with a long throw Ultegra road derailer on our tandem.... ...I took the wheel off to clean the cassette, and discovered the cogs were loose... I got a spacer at the LBS, and the looseness is gone. Haven't ridden it yet, but it shifts fine in the stand, and I expect the same on the road. Yes, Shimano Ten format cassettes (whether Shimano brand or not) use a 1mm spacer behind low gear. Sprockets loose on body is an amazingly common and annoying service error both at home and in some shops. Thanks, Andrew. The weird thing is I have zero memory of seeing any spacer when I took the cassette off, nor can I find one around my shop area. It worked fine before taking the cassette off to replace the spoke, so I suppose I didn't see and lost it. It's an actual Shimano part. First result in web search: https://www.bike-discount.de/en/buy/...cassette-26559 Interesting. The spacer my LBS gave me had the little tabs on the inner circumference. I didn't measure it, but it looked thin to be 1 mm. -- Ted Heise West Lafayette, IN, USA |
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