Bicycle Mechanics - FD-M770 - Max Teeth 44 or 48
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.
Can anyone confirm the max teeth for the Deore XT FD-M770? I get two answers in searching. Some say 44 and some say 48. Others say the 770 is 44 and the 772 is 48.
04-15-12, 07:51 AM
Shimano's own tech document states the FD-M770 is designed for a 44T large chainring and the FD-M771 is for a 48T. Look here:
Its says 44T/48T. You're looking at the Chainwheel chart. I'm assuming a 44 or 48 is good based on the FD chart, but on several order pages for it they only say max of 44 and I need a 48, some say 44/48 none say 48. It's why I'm looking for clarification. This years XT has a max of 42, so I want to pick on up as a spare before they are gone if it will do 48. If not I need to change a chainring.
04-15-12, 08:00 AM
It says 44 or 48 for two different models of the front derailleur.
FD-M770-10E (Model without BB plate) = 42T
FD-M770E (Bracket Type) = 44T
FD-M770 = 44T/48T
Powered by vBulletin® Version 4.1.12 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.