HI,

i replaced my square taper BB on my MTB around a year ago and kept the drivetrain as it is. i have now purchased a new triple crank, cassette and chain without really thinking about my bottom bracket. looking at the specs for the new crank, it recommends a 68x122mm. my current BB is a 68x127mm. i remember it was difficult to install the BB and im worried that i may ruin the threads taking it out and putting another back in. will the extra 5mm make too much difference?

i guess i could just fit it and see if i can adjust my front derailer.

any comments would be great!

Thanks

Phil