Surly Mr. Whirly Crank/Bottom Brackets Sets.
Complete crankset, assembled; Comes with spindle, bearings and all parts required for installation
Triple cranks come with aluminum rings, MTB chainline; singlespeed cranks come with Surly stainless steel chainring
Forged and machined AL-7075; 9-speed compatible
All armsets utilize 58mm BCD to mount spiders. This BCD remains the granny ring size regardless of spider's larger ring BCD
Pugsley version inlcudes longer spindle for use with 100mm BB shells; for use with 65mm rims only (larger rims cause chain/tire rub - use Surly MWOD crankset instead)