I'm attempting to install a mega exo BB for my new team issue carbon cranks, and could use some guidance. I installed the bottom bracket per the directions, and found that there was some binding between the crank and bearing. Upon further inspection, it seems that the splines are not clearing the bearing on the left side, and I'm assuming when I torque the crank down it's putting to much side load on the bearing. After reading some other threads on this subject several people suggested removing the two inner sleeves. I did try this and it seems the splines cleared the bearing, and it's spinning freely, but given a lot of durability issues on these bearings I'm not sure I want to leave the inner sleeves off.
- Is it "required" for the splines to clear the bearing, or should I just tighten the left crank down until it spins freely, regardless if it's seated?
- Am I missing something here? I removed the crush washer that goes between the bearing and frame, put the protective sleeves in, and tightened the bearings down. The splines still didn't clear the bearing, and there was a gap between the BB and frame, meaning the sleeve was preventing it from getting any closer. How can this be?
- Anyone run these without the inner sleeves? Did it seem to reduce durability?
To the untrained engineer, this seems like a pretty poor design. My 7 year old could swap an Ultegra crank. This has crush washers, rubber washers, loctite, and requires a ton of force to even get the crank arm on.
Anyway, any help would be appreciated.
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Thread: Mega EXO Installation