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#1
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Front axle, what thread?
Folks,
I'd like to get rid of the QR on my MTB and replace the whole chebang with a solid axle, preferably CroMo. I want the cones and other hardware from the old one to fit. Seems hard to find these days. What I measure on the existing axle is a diameter of 0.349" which usually translates to 9mm. However, most front axles I see are 9.5mm. Are they just called that or are they really 9.5mm? Some dealers have 9x1 which I think means 9mm and 24tpi. Is that the usual standard? The lengths are also a bit excessive, 155mm where only 140mm is needed but I could either cover that with something round (to avoid it tearing into flesh during a crash) or grind it off. -- Regards, Joerg http://www.analogconsultants.com/ |
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#2
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Front axle, what thread?
On 11/11/2017 4:06 PM, Joerg wrote:
Folks, I'd like to get rid of the QR on my MTB and replace the whole chebang with a solid axle, preferably CroMo. I want the cones and other hardware from the old one to fit. Seems hard to find these days. What I measure on the existing axle is a diameter of 0.349" which usually translates to 9mm. However, most front axles I see are 9.5mm. Are they just called that or are they really 9.5mm? Some dealers have 9x1 which I think means 9mm and 24tpi. Is that the usual standard? The lengths are also a bit excessive, 155mm where only 140mm is needed but I could either cover that with something round (to avoid it tearing into flesh during a crash) or grind it off. Most current solid fronts are m9x1 standard metric. Solid front axles used to be m8x1 and still are for the low end of bicycles. Your QR front is m9x1 What hub is it? Current Shimano F BO&QR hubs are m9x1 Why not just buy a solid front axle set complete? Dirt cheap, available anywhere bicycles are commonly serviced. Replace your bearings while you're in there. Nope that's not 24tpi they are metric. Nope 9.5mm was mostly the old rear solid axle format. Yes solid fronts run about 140mm overall I think your 155mm number is for a 9.5mm solid rear. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#3
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Front axle, what thread?
On 2017-11-11 14:34, AMuzi wrote:
On 11/11/2017 4:06 PM, Joerg wrote: Folks, I'd like to get rid of the QR on my MTB and replace the whole chebang with a solid axle, preferably CroMo. I want the cones and other hardware from the old one to fit. Seems hard to find these days. What I measure on the existing axle is a diameter of 0.349" which usually translates to 9mm. However, most front axles I see are 9.5mm. Are they just called that or are they really 9.5mm? Some dealers have 9x1 which I think means 9mm and 24tpi. Is that the usual standard? The lengths are also a bit excessive, 155mm where only 140mm is needed but I could either cover that with something round (to avoid it tearing into flesh during a crash) or grind it off. Most current solid fronts are m9x1 standard metric. Solid front axles used to be m8x1 and still are for the low end of bicycles. Your QR front is m9x1 Thanks, that is great. That means I can simply swap out the axle. What hub is it? Current Shimano F BO&QR hubs are m9x1 It is a Formula DC-73. The rear (DC-30) is different and has a 10mm axle. Some day I'll also replace the rear with a solid axle but that isn't as urgent. Why not just buy a solid front axle set complete? Doesn't matter, I'd also take a complete set but it should be CroMo. Dirt cheap, available anywhere bicycles are commonly serviced. Replace your bearings while you're in there. It's the old adjustable cone and balls deal but with pretty good dust caps. So far it all looked nice and clean when I re-greased. The MTB probably has 5-6k miles on it. Nope that's not 24tpi they are metric. Nope 9.5mm was mostly the old rear solid axle format. Yes solid fronts run about 140mm overall I think your 155mm number is for a 9.5mm solid rear. Good advice. 140mm would fit nicely. The main reason is that I always had the front axle work itself out and gouge the inside of the left fork drop-out because bicycles have the front brake caliper on the wrong side (back instead of front). The only way to prevent this from happening is lubing up the QR as good as possible and then close it very tight. A friend of mine had a QR snap off during a ride on his MTB. Luckily it was the rear wheel, the front could result in a ghastly crash. -- Regards, Joerg http://www.analogconsultants.com/ |
#4
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Front axle, what thread?
"Joerg" wrote in message ... On 2017-11-11 14:34, AMuzi wrote: On 11/11/2017 4:06 PM, Joerg wrote: Folks, I'd like to get rid of the QR on my MTB and replace the whole chebang with a solid axle, preferably CroMo. I want the cones and other hardware from the old one to fit. Seems hard to find these days. What I measure on the existing axle is a diameter of 0.349" which usually translates to 9mm. However, most front axles I see are 9.5mm. Are they just called that or are they really 9.5mm? Some dealers have 9x1 which I think means 9mm and 24tpi. Is that the usual standard? The lengths are also a bit excessive, 155mm where only 140mm is needed but I could either cover that with something round (to avoid it tearing into flesh during a crash) or grind it off. Most current solid fronts are m9x1 standard metric. Solid front axles used to be m8x1 and still are for the low end of bicycles. Your QR front is m9x1 Thanks, that is great. That means I can simply swap out the axle. Last time I swapped out QR axles, I just pinched solid ones from random wheels laying around the garage. The cones didn't look *EXACTLY* alike, but the originals were incompatible thread to the replacement axles. The whole salvaged axle and cones went in and served until the brake blocks wore through the alloy rim. |
#5
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Front axle, what thread?
On 2017-11-12 13:44, Ian Field wrote:
"Joerg" wrote in message ... On 2017-11-11 14:34, AMuzi wrote: On 11/11/2017 4:06 PM, Joerg wrote: Folks, I'd like to get rid of the QR on my MTB and replace the whole chebang with a solid axle, preferably CroMo. I want the cones and other hardware from the old one to fit. Seems hard to find these days. What I measure on the existing axle is a diameter of 0.349" which usually translates to 9mm. However, most front axles I see are 9.5mm. Are they just called that or are they really 9.5mm? Some dealers have 9x1 which I think means 9mm and 24tpi. Is that the usual standard? The lengths are also a bit excessive, 155mm where only 140mm is needed but I could either cover that with something round (to avoid it tearing into flesh during a crash) or grind it off. Most current solid fronts are m9x1 standard metric. Solid front axles used to be m8x1 and still are for the low end of bicycles. Your QR front is m9x1 Thanks, that is great. That means I can simply swap out the axle. Last time I swapped out QR axles, I just pinched solid ones from random wheels laying around the garage. The cones didn't look *EXACTLY* alike, but the originals were incompatible thread to the replacement axles. The whole salvaged axle and cones went in and served until the brake blocks wore through the alloy rim. I just noticed that finding a 9mm solid axle from CroMo is very tough. The ones I found were all non-metric or sealed-hub BMX. Or no key-way which can make a front wheel removal in the field hard. I'll probably visit some shops that sell and service used bikes which is where I bought my last CroMo rear axle for the old MTB (after which it didn't bend or break anymore). -- Regards, Joerg http://www.analogconsultants.com/ |
#6
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Front axle, what thread?
On 11/13/2017 12:21 PM, Joerg wrote:
On 2017-11-12 13:44, Ian Field wrote: "Joerg" wrote in message ... On 2017-11-11 14:34, AMuzi wrote: On 11/11/2017 4:06 PM, Joerg wrote: Folks, I'd like to get rid of the QR on my MTB and replace the whole chebang with a solid axle, preferably CroMo. I want the cones and other hardware from the old one to fit. Seems hard to find these days. What I measure on the existing axle is a diameter of 0.349" which usually translates to 9mm. However, most front axles I see are 9.5mm. Are they just called that or are they really 9.5mm? Some dealers have 9x1 which I think means 9mm and 24tpi. Is that the usual standard? The lengths are also a bit excessive, 155mm where only 140mm is needed but I could either cover that with something round (to avoid it tearing into flesh during a crash) or grind it off. Most current solid fronts are m9x1 standard metric. Solid front axles used to be m8x1 and still are for the low end of bicycles. Your QR front is m9x1 Thanks, that is great. That means I can simply swap out the axle. Last time I swapped out QR axles, I just pinched solid ones from random wheels laying around the garage. The cones didn't look *EXACTLY* alike, but the originals were incompatible thread to the replacement axles. The whole salvaged axle and cones went in and served until the brake blocks wore through the alloy rim. I just noticed that finding a 9mm solid axle from CroMo is very tough. The ones I found were all non-metric or sealed-hub BMX. Or no key-way which can make a front wheel removal in the field hard. I'll probably visit some shops that sell and service used bikes which is where I bought my last CroMo rear axle for the old MTB (after which it didn't bend or break anymore). You haven't really looked: https://www.ebay.com/itm/Shimano-Dur...gAAOSwk9dZnPkv cheaper for a new complete hub: https://www.ebay.com/itm/SHIMANO-HB-...kAAOSwr6pZ9M1K Or as I suggested earlier, visit any LBS which services bicycles. This is not rare or odd in any way. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#7
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Front axle, what thread?
On 2017-11-13 10:29, AMuzi wrote:
On 11/13/2017 12:21 PM, Joerg wrote: On 2017-11-12 13:44, Ian Field wrote: "Joerg" wrote in message ... On 2017-11-11 14:34, AMuzi wrote: On 11/11/2017 4:06 PM, Joerg wrote: Folks, I'd like to get rid of the QR on my MTB and replace the whole chebang with a solid axle, preferably CroMo. I want the cones and other hardware from the old one to fit. Seems hard to find these days. What I measure on the existing axle is a diameter of 0.349" which usually translates to 9mm. However, most front axles I see are 9.5mm. Are they just called that or are they really 9.5mm? Some dealers have 9x1 which I think means 9mm and 24tpi. Is that the usual standard? The lengths are also a bit excessive, 155mm where only 140mm is needed but I could either cover that with something round (to avoid it tearing into flesh during a crash) or grind it off. Most current solid fronts are m9x1 standard metric. Solid front axles used to be m8x1 and still are for the low end of bicycles. Your QR front is m9x1 Thanks, that is great. That means I can simply swap out the axle. Last time I swapped out QR axles, I just pinched solid ones from random wheels laying around the garage. The cones didn't look *EXACTLY* alike, but the originals were incompatible thread to the replacement axles. The whole salvaged axle and cones went in and served until the brake blocks wore through the alloy rim. I just noticed that finding a 9mm solid axle from CroMo is very tough. The ones I found were all non-metric or sealed-hub BMX. Or no key-way which can make a front wheel removal in the field hard. I'll probably visit some shops that sell and service used bikes which is where I bought my last CroMo rear axle for the old MTB (after which it didn't bend or break anymore). You haven't really looked: https://www.ebay.com/itm/Shimano-Dur...gAAOSwk9dZnPkv cheaper for a new complete hub: https://www.ebay.com/itm/SHIMANO-HB-...kAAOSwr6pZ9M1K Not so fond of a used axle but do you know whether the HB-TX500 has a CroMo axle or is otherwise sturdy enough for heavy trail use? I'd have to find some nuts as well but that should be easy. Or as I suggested earlier, visit any LBS which services bicycles. This is not rare or odd in any way. That's my plan. My LBS only has modern stuff and the next one that (hopefully still) has the more classic stuff is a bit of a ride away. Almost all singletrack though so it's a fun ride. -- Regards, Joerg http://www.analogconsultants.com/ |
#8
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Front axle, what thread?
used front axles are usable via low stress
roll axle over glass plate http://wheelsmfg.com/catalogsearch/result/?q=axles |
#9
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Front axle, what thread?
On 11/13/2017 2:03 PM, Joerg wrote:
On 2017-11-13 10:29, AMuzi wrote: On 11/13/2017 12:21 PM, Joerg wrote: I just noticed that finding a 9mm solid axle from CroMo is very tough. The ones I found were all non-metric or sealed-hub BMX. Or no key-way which can make a front wheel removal in the field hard. I'll probably visit some shops that sell and service used bikes which is where I bought my last CroMo rear axle for the old MTB (after which it didn't bend or break anymore). You haven't really looked: https://www.ebay.com/itm/Shimano-Dur...gAAOSwk9dZnPkv cheaper for a new complete hub: https://www.ebay.com/itm/SHIMANO-HB-...kAAOSwr6pZ9M1K Not so fond of a used axle but do you know whether the HB-TX500 has a CroMo axle or is otherwise sturdy enough for heavy trail use? I'd have to find some nuts as well but that should be easy. I'm curious what failure mode you expect in a standard steel solid front axle. -- - Frank Krygowski |
#10
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Front axle, what thread?
On Monday, November 13, 2017 at 1:38:59 PM UTC-7, Frank Krygowski wrote:
On 11/13/2017 2:03 PM, Joerg wrote: On 2017-11-13 10:29, AMuzi wrote: On 11/13/2017 12:21 PM, Joerg wrote: I just noticed that finding a 9mm solid axle from CroMo is very tough. The ones I found were all non-metric or sealed-hub BMX. Or no key-way which can make a front wheel removal in the field hard. I'll probably visit some shops that sell and service used bikes which is where I bought my last CroMo rear axle for the old MTB (after which it didn't bend or break anymore). You haven't really looked: https://www.ebay.com/itm/Shimano-Dur...gAAOSwk9dZnPkv cheaper for a new complete hub: https://www.ebay.com/itm/SHIMANO-HB-...kAAOSwr6pZ9M1K Not so fond of a used axle but do you know whether the HB-TX500 has a CroMo axle or is otherwise sturdy enough for heavy trail use? I'd have to find some nuts as well but that should be easy. I'm curious what failure mode you expect in a standard steel solid front axle. -- - Frank Krygowski anything goes on the SAF |
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