Help/options for replacing Trek 7.3FX BB
enigmatic
Posts: 2
Hi,
I have a Trek 7.3FX bike that I've had for a couple of years. I'm interested in improving the bike a bit and have been looking at options.
One thing I'd like to do is perhaps replace the bottom bracket. Trek have told me this is a 68x122.5 square taper.
One option would be to replace the BB with a lighter version of that installed. It has also been suggested that I switch to Octalink.
Problem I'm having is that I can't find any BB other than square taper for the size I need.
Anyone any ideas what I can do?
Cheers,
Chris
I have a Trek 7.3FX bike that I've had for a couple of years. I'm interested in improving the bike a bit and have been looking at options.
One thing I'd like to do is perhaps replace the bottom bracket. Trek have told me this is a 68x122.5 square taper.
One option would be to replace the BB with a lighter version of that installed. It has also been suggested that I switch to Octalink.
Problem I'm having is that I can't find any BB other than square taper for the size I need.
Anyone any ideas what I can do?
Cheers,
Chris
0
Comments
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123mm is the stock nearest size, don't worry about 0.5mm, moving the cranks by 0.25mm isn't going to be noticeable!
If you want to go significantly lighter you'll need to at least go to Octalink or similar holow axle with new cranks.
SimonCurrently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0
