34.8 derailleur on 26.x seat tube
11-19-08, 11:09 PM
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34.8 derailleur on 26.x seat tube
Hi,
I'd like to mount a 34.8, clamp-on derailleur (SRAM Rival) on an old steel bike with a traditionally-sized seat tube [EDIT: 28.x? Whatever it is...]. Is this going to work if I shim it, or will the derailleur position somehow be off with respect to the chainrings. (I'd expect this to work but just wanted to make sure before I buy something.)
Thanks,
Daniel
I'd like to mount a 34.8, clamp-on derailleur (SRAM Rival) on an old steel bike with a traditionally-sized seat tube [EDIT: 28.x? Whatever it is...]. Is this going to work if I shim it, or will the derailleur position somehow be off with respect to the chainrings. (I'd expect this to work but just wanted to make sure before I buy something.)
Thanks,
Daniel
11-19-08, 11:22 PM
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The last time I bought a Shimano FD, instead of being able to choose a specific size, it came in 34.9mm with adapters for 28.6mm and 31.8mm. Adapters are available here:
https://www.bikeparts.com/search_resu...p?ID=BPC128404
https://www.bikeparts.com/search_resu...p?ID=BPC128405
https://www.bikeparts.com/search_resu...p?ID=BPC128404
https://www.bikeparts.com/search_resu...p?ID=BPC128405
11-20-08, 12:00 AM
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Hi,
I'd like to mount a 34.8, clamp-on derailleur (SRAM Rival) on an old steel bike with a traditionally-sized seat tube [EDIT: 28.x? Whatever it is...]. Is this going to work if I shim it, or will the derailleur position somehow be off with respect to the chainrings. (I'd expect this to work but just wanted to make sure before I buy something.)
Thanks,
Daniel
I'd like to mount a 34.8, clamp-on derailleur (SRAM Rival) on an old steel bike with a traditionally-sized seat tube [EDIT: 28.x? Whatever it is...]. Is this going to work if I shim it, or will the derailleur position somehow be off with respect to the chainrings. (I'd expect this to work but just wanted to make sure before I buy something.)
Thanks,
Daniel
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Jeff Wills
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Jeff Wills
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11-20-08, 01:04 AM
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It's possible that the Low limit will not be far enough inboard on the derailleur to work with your particular crankset/bb. If you're running a crankset with very tight clearance with your frame, it's less likely to work. Sometimes it works. Sometimes it doesn't. In my experience. -C
