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124.5mm bottom bracket?!

JDPowerJDPower Posts: 25
edited August 2018 in MTB workshop & tech
I'm looking to replace my bottom bracket. Was gonna get a Shimano UN55, but my BB axle is 124.5mm, closest the UN55 comes in is either 122.5 or 127 (and 124.5 appears almost obsolete in any brand).

Will it be a major issue going with one of them? And if not should I go up or down a size???

Cheers :)

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