IRD Spindle for QB-40 Bottom Bracket
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High quality machined CrMo steel replacement spindle for the QB-40 Bottom Bracket.
Polished races. JIS square taper.
If you already have a QB-40, but need a different width, you don't have to buy a whole new bottom bracket. You can just buy the different size spindle.
That's something you can't do with a cartridge BB.