2009-01-05

What is chain wrap?

You need to determine chain wrap for rear derailer sizing (medium cage or long cage). An explanation.


SRAM specs chain wrap
short: 30
mid: 37
long: 45

Stumpjumpers are currently specd' with mid-cages, though here's the calculations
(44-22 = 22) + (34-11 = 23) = 45

Sounds like Specialized is expecting you to not dummy shift.

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