Surly Mr Whirly crank arms review

Highly versatile

Our rating 
3.5 out of 5 star rating 3.5
£120.00 RRP
Surly Mr Whirly crank arms

Our review

A nice piece of kit, but this much adaptability doesn’t come cheap
Skip to view product specifications

The appeal of Surly’s modular crankset is that it can be configured to suit any bike and there’s a good choice of Surly or Salsa chainring/bashguard combos. Like most Surly products it’s cautiously overbuilt to take a fair amount of punishment. 

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But this much versatility doesn’t come cheap. By the time you add a couple of rings and/or a bashguard to the crank arms (£120), spider (£65) and axle (£60) you’re looking at about the same price as the complete triple setup (£320), and you still need to buy (Shimano cup compatible) bottom bracket bearings.

The weight of our 33/22-tooth, 175mm arm double setup is fairly reasonable considering the fact that we used a stainless steel outer ring. A hefty chromoly steel axle emphasises Surly’s design attitude: this is a crankset that’s intended for heavy-duty cross-country use and a long multi-bike life, and our experience is that it does the job.

Bear in mind that while the five-arm spider offers a good choice of rings from sister brand Salsa as well as Surly, most other cranksets these days are four-bolt.

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This article was originally published in What Mountain Bike magazine, available on Apple Newsstand and Zinio.

Product Specifications

Product

Name Surly Mr Whirly crank arms(12)
Brand Surly

Description Weight: 760g with two rings, BB axle 145g, Lengths: 170mm, 175mm (tested), 180mm
Weight (g) 951
Material 7075 T6 Aluminium Alloy Chromoly Steel
Chainring Size (No of Teeth) 22 32 44
Crank Arm Lengths 170mm 175mm
Chainring Options Single Triple