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#21
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Brake pads eating rims?
On Tue, 28 Jun 2005 20:42:21 -0400, "Phil, Squid-in-Training"
wrote: I've used the same pads they sell at Walmart... They picked up grit and lost all braking power. I then switched my brakes to dual-pivots with 10-year-old Shimano 105 pads and they work very well. Maybe that's the key to using Shimano pads -- they need to be aged 10 years or so. Forget aging those tubulars, age the brakes! Pat Email address works as is. |
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#22
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Brake pads eating rims?
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#23
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Brake pads eating rims?
i bought long dirt bike salmon pads for the rainy season. puttem on the
rear centerpulls with a conti set of salmons on the front. still not setup right and the rim is greasy, no brake prep. ahhh now it stops!! no more sliding into the canal past the bread truck to fight it out with the gators. |
#25
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Brake pads eating rims?
jim beam wrote:
wrote: Hi all, Bought a new road bike this year: Shimano WH-R550 wheelset Tektro RX40 brakes Rode maybe 50 miles, and found that my braking power was weak. Also, I heard what I can only describe as a horrible scraping sound. So I remove my wheels and inspect my brake pads. What do I find? Several chunks of bright, shiny metal (I assume from my rims). My LBS tells me that "Yeah, they're crappy brakes" (actually referring to the brake pads). He gave me some DA pads for replacement. I cleaned up the rims, put the new pads on the bike and voila! Instantly better stopping power...... Rode yesterday morning...everything was okay until a 50mph twisty descent. Near the bottom I did some *moderate* braking (slightly more pressure than my typical controlled traffic light stop, just to get me back down to 35-40 mph). Suddenly, I hear that horrible "eating your rims" sound. Since I'm in the middle of a long ride and have no extra pads, I stop and dig out the shards of metal in my rear brake pads. Then, I proceed to test 'em out, only to discover that the front brakes have become relatively weak/noisey. Stop again, and find that the front pads are wearing in an irregular pattern (more wear on bottom than on top...but no metal this time). Both sets of pads appear to be properly aligned with the rim when engaged. WTF? Does this happen to anyone else? Why are my rims being eaten? I don't care about replacing worn brake pads once in a while, but replacing my new rims on my new bicycle......grrrrr. FWIW, I have heard about using KoolStop Salmons, but my LBS didn't have any. I'm not convinced that they'd be much better than the DA pads....to me it seems like a rim problem. Should my LBS deal with this, or am I stuck with crappy rims? TIA, Dave the previous generation of shimano have significant toe in set at the factory. toe in, while allegedly good for squeal and definitely good for modulation, is absolutely a nightmare for its ability to trap grit. you could not contrive a better way to be more destructive. my solution is to either run campy brake calipers with their factory orbital pad holders & set them flat with the rim, or if using shimano, buy after market orbital pad holders and mount those flat with the rim. you may be interested to know that the current [new] generation of shimanos have orbital pad holders from factory. [shimano learn as they go.] this cuts down grit embedding almost to zero, regardless of the pad you use. Is that why we have horrendous brake adjustment procedures such as the Park BT3 he http://www.parktool.com/tools/BT_3.shtml If Walmart V-brakes have orbital mounts, how come Shimano 105 doesn't? Like you said, learn as they go. -- Phil, Squid-in-Training |
#26
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Brake pads eating rims?
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#27
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Brake pads eating rims?
Phil, Squid-in-Training wrote:
jim beam wrote: wrote: Hi all, Bought a new road bike this year: Shimano WH-R550 wheelset Tektro RX40 brakes Rode maybe 50 miles, and found that my braking power was weak. Also, I heard what I can only describe as a horrible scraping sound. So I remove my wheels and inspect my brake pads. What do I find? Several chunks of bright, shiny metal (I assume from my rims). My LBS tells me that "Yeah, they're crappy brakes" (actually referring to the brake pads). He gave me some DA pads for replacement. I cleaned up the rims, put the new pads on the bike and voila! Instantly better stopping power...... Rode yesterday morning...everything was okay until a 50mph twisty descent. Near the bottom I did some *moderate* braking (slightly more pressure than my typical controlled traffic light stop, just to get me back down to 35-40 mph). Suddenly, I hear that horrible "eating your rims" sound. Since I'm in the middle of a long ride and have no extra pads, I stop and dig out the shards of metal in my rear brake pads. Then, I proceed to test 'em out, only to discover that the front brakes have become relatively weak/noisey. Stop again, and find that the front pads are wearing in an irregular pattern (more wear on bottom than on top...but no metal this time). Both sets of pads appear to be properly aligned with the rim when engaged. WTF? Does this happen to anyone else? Why are my rims being eaten? I don't care about replacing worn brake pads once in a while, but replacing my new rims on my new bicycle......grrrrr. FWIW, I have heard about using KoolStop Salmons, but my LBS didn't have any. I'm not convinced that they'd be much better than the DA pads....to me it seems like a rim problem. Should my LBS deal with this, or am I stuck with crappy rims? TIA, Dave the previous generation of shimano have significant toe in set at the factory. toe in, while allegedly good for squeal and definitely good for modulation, is absolutely a nightmare for its ability to trap grit. you could not contrive a better way to be more destructive. my solution is to either run campy brake calipers with their factory orbital pad holders & set them flat with the rim, or if using shimano, buy after market orbital pad holders and mount those flat with the rim. you may be interested to know that the current [new] generation of shimanos have orbital pad holders from factory. [shimano learn as they go.] this cuts down grit embedding almost to zero, regardless of the pad you use. Is that why we have horrendous brake adjustment procedures such as the Park BT3 he http://www.parktool.com/tools/BT_3.shtml /that/ thing is an abomination. If Walmart V-brakes have orbital mounts, how come Shimano 105 doesn't? Like you said, learn as they go. |
#28
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Brake pads eating rims?
Actually the tektro rx40 brakes are one of the better brake calipers o the market. better than 105 by far and Ide say a tie with dura-ace. Iv got both da and tektro on my bikes and cant tell any difference.. 105' seemed mushy.. salmon pads are always a good upgrade and make any brak noticably better. If anyone has grinding noise problems, check your pads.. then you rims.. Machined finished rims tend to do this more than any othe cause. the smoother surfaced rims make for more even braking and les noise. Anyone trying to save money would not be out of line to go fo the rx40 calipers 10 grams more weight than da. but the brake i definitely more aero than anything smimano, fsa, or campy makes. an they are only $60.. no brainer! Notryt (cat:3 -- notryt |
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