1 piece to 3 piece crank conversion

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Is this redline on eBay a full conversion ?
 

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The BB shell size is what I was referring to. I’d guess that’s an American BB. You can get several spindle and bearing ID options but American is American

A sealed American BB with a 19 mm spindle is probably the most common for BMX bikes that are taking a lot more abuse than any cruiser
 

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