
I bought this 113mm x 73mm bottom bracket to fit the new 2021 GT Aggressor Expert which has a plastic retainer ring and plastic bottom bracket is delivered. This one spins better and has a metal end cap and strut. I bought it because it is 10mm shorter than the stock BB on this bike and the stock BB didn't work with the rear chain link after changing to a single speed crank and chainring. Now, after a simple installation, a great switch. From what I understand GT bikes are pretty terrible, but luckily Revain has all the parts you need to replace factory junk.

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