Thread: The "Should I..." Thread
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Old 07-05-11 | 07:23 PM
  #68  
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yummygooey
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Bikes: Geekhouse Deerfield, GT Edge Ti, Spooky Skeletor, TET Track, Ritchey P-650b, Bridgestone MB-3

I thought 75's were ISO taper?

According to Sheldon Brown, an ISO crank on a JIS taper will sit ~4.5mm further out than if you were to use a ISO taper of the same length. So if I used a 113mm JIS tapered Shimano BB, the crank will sit a total of 6.5mm out?

4.5 + ([113-109]/2) = 6.5mm

Or are you not supposed to divide that second quantity by 2?
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