-
Not sure you are looking at some fancy, specific BB but decent shimano square BB can be found on eBay in many lengths for 10/20£. Another idea, maybe someone could start a thread just to change BBs?Guys adapting road bikes to ss are always looking for short bb.
Just to add... Those spacers someone mention before were designed to adapt a 73 mm BB to a 68mm frame and not to increase/decrease axle length.
I'm not sure I get what the problem is... if you have a square bottom bracket, just get a new one! They come in all type of lengths! Some other types of bottom brackets also have different lengths but probably not as many as square!
If you have a 114mm, just get a 120mm! Bum! You got 3mm extra clearance...