Bicycle Mechanics - 9 speed cranks on 8 speed drivetrain
Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.
08-22-04, 09:29 PM
My wife has a 2004 Gary Fisher Marlin. She would like to change the crank lenght to a 170mm from the current 175mm lenght.
I have a new '04 RACEFACE DIABOLUS X-TYPE MOUNTAIN BIKE DH CRANKSET that is a 170mm in lenght. I am not using it and would like to put it on her bike to save some money.
My question is..... Would this crank set work on her 8 speed drivetrain? The front and rear der. are both Shimano deore.
Thanks :D ;)
08-22-04, 09:48 PM
The alignment may be slightly off...that's what I remember from the last time I attempted it. For the most part it'll work, but you may need a wider cage derailleur so the chain doesn't rub -- unless you don't mind rubbing.
08-23-04, 01:22 PM
Worked fine for me, and when I went to 9 spd in the back, it was ready.
08-24-04, 02:19 AM
Since you have it, myswell try it...
I recently needed to purchase an 8 speed crankset, which I found hard to find. I had read "The 9-speed chainring release teeth and pick-up teeth are re-profiled for the narrower chains. Therefore, you cannot use an 8-speed chain, and the pick-up teeth will make noise against the chain during minor cross chaining. " at http://www.worldcycleboise.com/techtips.htm and similar things at other places that suggested not to mix 8 speed and 9 speed parts, although my LBS said it would work fine to use 9 speed chainrings on an 8 speed drivetrain.
08-24-04, 12:25 PM
AFAIK, SHeldon says it should work. Worst case scenario is that you would get some minor noise. If that is so, there is one easy solution:
- Use a 9-speed chain.
The 9-speed chain will work equally well with an 8-speed drivetrain, and for the price differencial, you will be able to buy a lot of 9-speed chains before you pay for a mew 8-speed crankset.
08-24-04, 04:12 PM
Thanks for all the help. :D
Powered by vBulletin® Version 4.1.12 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.