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When buying a BB it's important that you know whether it has a 24mm or 30mm diameter right? Whenever I look at the specs of BBs online they have whether it's a 68/73, 83, or 100mm length, but not whether it has a diameter of 24 or 30mm. I want to get a race face atlas crankset, but I'm pretty sure it they only come in a 30mm version and my bike has a 24mm bottom bracket.