Surly O.D. Fat Bike Crankset 22/36 Teeth

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Description of Surly O.D. Fat Bike Crankset 22/36 Teeth

Surly designed the O.D. 2x crankset to offer frame and tire clearance while maintaining a reasonable q-factor (pedal stance). Maximizing the distance between the chain and the tire is important on fat bikes such as Surly’s Pugsley. With normal cranks, wide tires on wide rims can rub the chain when in the lowest, or farthest-inboard, gear combinations. The O.D. crank doesn’t just add a longer spindle to move the rings outboard. Rather, it does away with the big ring of a standard triple and moves the middle and granny rings to the outer and middle positions. This effectively moves the rings outboard without moving the arms outboard to far. The O.D. is a simple, dedicated version of this idea.

Forged of 7000 series T6 aluminum, the O.D. crank is a 2-piece, with spindle embedded inextricably in the drive side arm. It’s a dedicated 2x, although its chainline is outboard a bit compared to standard mountain cranks, and it is 9 and 10 speed compatible.
This version fits 100 mm BB shells to accommodate the 17,5 mm frame offset required for 4" tires like Surly’s Pugsley. It will also fit most frames with a symmetric 150/157 mm rear spacing.

The chain rings (36/22) are designed to shift best in specific combinations.

The bearings on which they spin are also worth mentioning: Surly upgraded these bearings to aftermarket Enduro bearings with double labyrinth seals, meaning they actively shed and stay clean of dust, muck, and grime, even in wet and muddy climates.
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Fact Sheet of Surly O.D. Fat Bike Crankset 22/36 Teeth

Product Name: Surly O.D. Fat Bike Crankset 22/36 Teeth
Manufacturer: Surly
Item Code: SUR177481
Year: 2016
Material: crank arms: 7000-T6 aluminium
chain rings: aluminium at 94mm BCD, stainless steel at 58mm BCD
spindle: chromoly steel
Weight: approx. 905 gram (without bottom bracket - manufacturer's specs)
Chainwheel, number of teeth: 22/36 teeth
Fitting for derailleur: SRAM and Shimano 9 and 10-speed
Axle profile: integrated 24 mm crank spindle, 144 mm length
BB shell width: 100 mm (BSA)
Bolt Circle (mm): 94/58 mm
Type of chain: 9/10-speed
Q-Factor: 200,3 mm
Included in delivery: crankset including BSA bottom bracket cups
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Surly O.D. Fat Bike Crankset 22/36 Teeth
in stock, delivery time 1-3 daysCrank length: 170 mm
in stock, delivery time 1-3 daysCrank length: 175 mm
Delivery time 2-4 daysCrank length: 180 mm
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