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HomeSurly Mr. Whirly Crank Arm Set 170mm Black

Surly Mr. Whirly Crank Arm Set 170mm Black

Surly Mr. Whirly Crank Arm Set 170mm Black

Code: CR0020
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Surly Mr. Whirly Crank Arm Sets are sold without spider or spindle for complete customization.
  • Build it to be the crank you want: single, double, triple or trials
  • Outboard-style bearings must be purchased separately; use Shimano Mtn, Race Face X Type or FSA MegaEXO
  • Chainrings, and chainring mounting bolts sold separately
  • Armsets include non-drive side bearing adjust cap, drive side PTO bolt & cap, and two sets of spider mounting bolts (one short for spider mounting only, and one long for mounting spider with granny ring)
  • Forged and machined 7075 aluminum
Item Specifications
Intended UseMountain
Chainring BCD58mm
Arm Length170mm
Crank Intended UseMountain,Single Speed,DH/Freeride
Defined ColorBlack

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