Ok so since I'm on a BB question roll… I bought this Wheels Mfg on ebay with the understanding that it was a 68/73 BB. I got it and measured inside to inside and it measures 62mm. It also did not come with any spacers, only these 2 orange silicon washers? I googled the 2207 part number but Im not finding any info on it. Anyone know what I bought?
by AustinTXwtf
3 Comments
The 68/73 is your frame’s bottom bracket shell width. That sleeve between the two should have a sliding fit on one side, effectively allowing it to span a 68 mm frame or an 73 mm wide BB. You don’t even really need the sleeve, unless you’re running cables or wires internally through the BB and need to prevent them from rubbing on the crank’s spindle.
Those orange things are bearing shields. They get installed between the crank and the bearing, not the bearing cup and the frame.
The washers are the seals for your cartridge bearing inside the cup of the BB to keep out the debris. You should be able the remove the sleeve between the BBs and install them on the bike
To tack onto what has already been said, whether or not you need any BB spacers (between the BB and frame) or crank spindle spacers (between crank and BB), or both, depends entirely on what crank you are trying to install into this BB, as different cranks have different spindle lengths.