Bottom bracket replacement
#1
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Join Date: Nov 2009
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Bottom bracket replacement
Hey everyone, i started hearing creaking when i pedal HARD (my weight on the pedal) and am pretty sure its the bottom bracket.
I own a 2010 Rocky Mountain Fusion all stock parts, therefore my BB must be: TruVativ Power Spline
My issue is that i cannot find specs online on the exact size of the BB that my bike has... Is it alright to approximate the size of the BB from the frame? I ask as i do not have the tools to take out the BB yet.
Also, i plan to get: SHIMANO LX ES51 OCTALINK BB
Cheers,
Phil.
I own a 2010 Rocky Mountain Fusion all stock parts, therefore my BB must be: TruVativ Power Spline
My issue is that i cannot find specs online on the exact size of the BB that my bike has... Is it alright to approximate the size of the BB from the frame? I ask as i do not have the tools to take out the BB yet.
Also, i plan to get: SHIMANO LX ES51 OCTALINK BB
Cheers,
Phil.
#2
Senior Member
I dont think an octalink BB will work with cranks you have if you have Truvativ BB. Truvativ has different spline configuration (12 splines vs 8 on octalink I believe). Also, you may not need a new BB. Creaking is more often an indicator that BB shell and cup threads need to be greased up. If, when you turn cranks by hand, they seem to turn smoothly, I would suggest you just grease up shell and BB cup threads (or better, use anti seize) and reinstall current BB. If problems persist, Truvativ spline BBs are pretty cheap.
Last edited by DOS; 05-22-12 at 07:24 AM.
#4
#6
A little North of Hell
powerspline
TruVativ is the only source for these bottom brackets.
tool.
page 17-18
https://cdn.sram.com/cdn/farfuture/aV...nual-rev_1.pdf
#7
Senior Member
No not ISIS. Truvativ ISIS has 10 splines. If you want to keep your existing carnks, you need the 12 spline powerspline BB. As for grease, I use automotive antiseize -- I buy it at autoparts stores-- on my BB threads. But bicycle grease -- phil wood or Park or any of variety of other brands would be fine.