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Product Reviews - New Product Introductions



At the heart of it Surly's Mr. Whirly crank is an external bottom bracket style crank with a removable spider and interchangeable spindles but really it is so much more than that.  What it really is all about is versatility, read OPTIONS.   

As a complete setup the Mr. Whirly is available in a 22/32/44 tooth triple with 170mm and 175mm arm lengths and a 33 tooth single with 175mm and 180mm arm lengths.  All are compatible with 68mm and 73mm bottom bracket shells.  Got a Pugsley?  The triple is also available in 100mm bottom bracket width.  The native bolt pattern is 58/94 5-bolt compact, more on that later.

Now if that isn't enough options for you out of the box there will be parts available to swap around your crank to whatever setup you could want or even build your own from the ground up.  You could swap the spindles between 68/73mm and 100mm Pugsley specific.  You can change the arms between 165mm, 170mm, 175mm and 180mm.  You could swap the spider between 58/94mm 5-bolt, 64/104mm 4-bolt and 110mm 5-bolt.  Never be limited on chainring size again!  Which brings me back to the 58/94mm 5-bolt compact native bolt pattern I mentioned before.

Some of you younger folks might not remember the days when the standard mountain bike crank was 110mm 5-bolt.  It worked really well for a long time but at some point folks wanted (or the big S wanted to sell) "compact" gearing so the 58/94mm 5-bolt compact bolt pattern was born.  This was then and is today a very versitile bolt pattern.  For my money it is the best because although I love a 1x9 setup, my next favorite when I need a little more range is a 2x9.  A 58/94mm 5-bolt compact crank will fit as small as a 30 tooth middle position ring or even a 29 if you could find one.  For me a 30/42 2x9 is always a money setup.

Well, at some point in the infinite wisdom of component engineers (which is lost on me) the 64/104mm 4-bolt compact crank became the "new" standard beause it was deemed better somehow.  Much like asbestos and lead paint, the 58/94mm 5-bolt compact crank fell out of favor and bit the dust.  Problem is for me and other 2x9 lovers of my ilk, the 64/104mm compact crank only fits down to a 32 tooth middle position ring.  Well, loosing 2 teeth on you low end gearing stinks when you are actually using all those gears.  Even worse when you drink the Kool-Aid and step up to 29" wheels like have done.

Well, I don't have to pyne away for my lost bolt pattern anymore.  Surly has brought it back to it's full glory with the Mr. Whirly cranks and put in a package for the 21st century with an external bottom bracket system that is compatible with Shimano Hollow Tech II and RaceFace X-Type bottom bracket cups.  Of course Surly is also wise enough to know that not everyone is like me and gives you the option of switching to whatever bolt pattern you want or need.  Who knows, maybe you have a bunch of sweet chainrings kicking around your basement that don't have the right crank to fit on.  Get yourself a Mr. Whirly and you will.


Surly Mr. Whirly Crankset
 $287.95

 Buy / Details

Surly Mr. Whirly Crankset: 170mm, 68/73mm BB, 22/32/44t. Innovative new crank design from the folks at Surly that uses interchangeable external BB spindles and chainring spiders. Allows swtiching between 68/73mm and 100mm BB shells. Interchangable spiders allow switching between 110mm 5-bolt, 94mm 5-bolt and 104mm 4-bolt chainring patterns...
Surly Mr. Whirly Crankset
 $294.95


Surly Mr. Whirly Crankset: 170mm, Pugsley Specific, 22/32/44. Innovative new crank design from the folks at Surly that uses interchangeable external BB spindles and chainring spiders. Allows swtiching between 68/73mm and 100mm BB shells. Interchangable spiders allow switching between 110mm 5-bolt, 94mm 5-bolt and 104mm 4-bolt chainring...
Surly Mr. Whirly Crankset
 $287.95


Surly Mr. Whirly Crankset: 175mm, 68/73mm BB, 22/32/44t. Innovative new crank design from the folks at Surly that uses interchangeable external BB spindles and chainring spiders. Allows swtiching between 68/73mm and 100mm BB shells. Interchangable spiders allow switching between 110mm 5-bolt, 94mm 5-bolt and 104mm 4-bolt chainring patterns...
Surly Mr. Whirly Crankset
 $294.95


Surly Mr. Whirly Crankset: 175mm, Pugsley Specific, 22/32/44. Innovative new crank design from the folks at Surly that uses interchangeable external BB spindles and chainring spiders. Allows swtiching between 68/73mm and 100mm BB shells. Interchangable spiders allow switching between 110mm 5-bolt, 94mm 5-bolt and 104mm 4-bolt chainring...
Surly Mr. Whirly Single Speed Crankset
 $253.95


Surly Mr. Whirly Single Speed Crankset: 175mm, 33t, 68&73mm BB, Black. Innovative new crank design from the folks at Surly that uses interchangeable external BB spindles and chainring spiders. Allows swtiching between 68/73mm and 100mm BB shells. Interchangable spiders allow switching between 110mm 5-bolt, 94mm 5-bolt and 104mm 4-bolt...
Surly Mr. Whirly Single Speed Crankset
 $253.95


Surly Mr. Whirly Single Speed Crankset: 180mm, 33t, 68&73mm BB, Black. Innovative new crank design from the folks at Surly that uses interchangeable external BB spindles and chainring spiders. Allows swtiching between 68/73mm and 100mm BB shells. Interchangable spiders allow switching between 110mm 5-bolt, 94mm 5-bolt and 104mm 4-bolt...
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