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.