I'm looking to replace the bottom bracket in my Windsor "The Hour" since I'm buying a new crank set for my bike. What are the dimensions for the bottom bracket: both shell width and shaft length? I can take the bottom bracket out to measure it, but I would rather only do it once while installing the new parts.

1 Answer 1


In http://www.bikesdirect.com/products/windsor/thehour.htm it says:

Sealed Cartridge 103mm

Trying to find shell widths for 103mm sealed cartridges only gives 68mm as the only possible combo for 103mm the length. e.g http://sheldonbrown.com/harris/bottombrackets.html

So it should be 68m x 103mm.

  • Hey, thanks for that. I was just so stuck in googling, "windsor hour bb" and such so much so that I didn't even think on looking up typical bracket standards.
    – arete
    Jul 29, 2013 at 16:27

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