Mr Whirly Axle
100% CroMoly steel
Proprietary dimensions and spline for use only with Surly Mr. Whirly cranks
Short; to fit 68 and 73mm BB shells :BBSUWA68
Long; to fit 100mm BB shells e.g. Pugsley with 17.5mm offset: BBSUWA10
XL; to fit 100mm BB shells but for Moonlander with 28mm Offset, spindle length 171mm: BBSUWA71
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