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Item # SRY0006
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Surly Mr. Whirly Singlespeed Crankset $0.00
Surly’s Mr. Whirly isn’t what you did to your friend at a party in college—well, maybe it is—but it’s also Surly’s badass answer to the single-speed crankset. Mr. Whirly’s arms and spider are forged from hardy 7075-T6 aluminum and connect to a durable 33t stainless steel chainring for rock-slapping, log-hopping pleasure.
- Cro-Moly spindles provide reliability and strength
- Common 58/94mm bolt-circle-diameter (BCD) for hassle-free chainring interchangeability
- All basic assembly hardware included
- Spindle fits 68/73 BB shells
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Community & Reviews
Can anyone explain the difference between...
Can anyone explain the difference between the two different sizes?
About 5mm. The numbers refer to the measurement of the crank arm, from the center of the bottom bracket hole to the center of the pedal hole.