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Praxis Works Girder carbon M30 Boost crank set 170mm 10-/11-/12 speed 32 teeth (without bottom bracket )

incl. 20% VAT Free shipping to GBplus shipping costs.


Only online and Click & Collect
Currently available in the Kronberg shop
Item #
170mm 312,60€ 58880119
Please choose a variant.

The MTB crank girder from Praxis Works

The Girder MTB crank is a bench when it comes to ruggedness. This also applies to the carbon variant, and so it is not surprising that it has become the crank of choice for many ambitious trail and enduro riders. The lightweight and stiff M30 axle system and, for the aluminum version, 65 grams lighter crank arms result in a package with a "must-have" effect.

With its Direct Mount (Sram 3-Bolt) chainring mount, the crank is perfectly customizable: a Praxis Works Wave A-type chainring makes it compatible with the traditional 49mm chain line, with a B-type chainring turning it into a 52mm chainline boost crank ,

The Wave Direct Mount chainring itself holds the chain reliably by its sophisticated, alternating tooth design, but hardly ever settles with dirt or mud.

Suitable M30 bottom bracket bearings from Praxis Works allow use of the crank in almost any frame: BSA, BB90 / 92, BB30, PF30 and even T47 bottom bracket are available.


  • Practice Works M30 axle system
  • - lightweight, stiff carbon crank arms
  • - patented Wave Tech tooth design
  • Practice Works M30 bottom bracket required

Technical specifications

specification description
Compatibility drive Shimano / SRAM 10- / 11- / 12-speed
attachment Direct mount
catenary 52mm
Q factor 172mm
mass 550g (at 175mm with 32 teeth)


  • 1 x Practice Works Girder Carbon M30 Boost Crankset (without Bottom Bracket) (see item description for details)
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