The most popular bottom bracket version in 2010 has to be the Mid. Mid is basically a typical American size bearing, without the aluminium collar. Since the Twombolts use a 22mm spindle, our Mid BB is for a 22mm spindle.
If you have a Mid BB frame and 19mm spindle, you can get the American BB, and just remove the aluminium collars.
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If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.More information on returns