Bottom Bracket Replacement Question
07-04-11 | 07:03 PM
#1
Thread Starter
Junior Member
Joined: May 2011
Posts: 15
Likes: 0
Bottom Bracket Replacement Question
I have a 1988 Trek 660 with Shimano 600 Ultegra with a worn bottom bracket. The spindle size is 68 x 116 with 1.37 x 24 shell threading. I was thinking of using the Shimano BB-UN54 however the closet size is 68 x 115. What kind of problems (adjustments) will the 115 (vs. the existing 116) create?
07-04-11 | 07:22 PM
#2
Senior Member
Joined: Dec 2005
Posts: 7,848
Likes: 4
115 to 116 is 1 mm ... 1mm divided in 2 is 0.5 mm do you think it will be a problem to have a 0.5 mm longer bb axle at each side?
If the original bb is symmetric just be sure the one is symmetric too. If asymmetric get asymmetric, besides that doubt you will have a single problem.
Good luck
If the original bb is symmetric just be sure the one is symmetric too. If asymmetric get asymmetric, besides that doubt you will have a single problem.
Good luck
07-04-11 | 07:38 PM
#3
Thread Starter
Junior Member
Joined: May 2011
Posts: 15
Likes: 0
115 to 116 is 1 mm ... 1mm divided in 2 is 0.5 mm do you think it will be a problem to have a 0.5 mm longer bb axle at each side?
If the original bb is symmetric just be sure the one is symmetric too. If asymmetric get asymmetric, besides that doubt you will have a single problem.
Good luck
If the original bb is symmetric just be sure the one is symmetric too. If asymmetric get asymmetric, besides that doubt you will have a single problem.
Good luck
