The Cratus aero crankset has been designed to be class leading in every aspect from aerodynamics and drivetrain efficiency through to biomechanics and stiffness. The unique crankarm length adjustment system allows you to adjust between 145mm and 160mm (short arm crank) and 160mm and 175mm (long arm crank), making bike fitting and aero testing significantly quicker and easier. The super narrow Q factor of 124.5mm is class leading and helps to further improve both your biomechanics and aerodynamics. The proprietary aero chainring contains a range of unique improvements: stepped tooth to chainring profile reduces aerodynamic flow separation off the chain outer plates; 144 BCD reduces chainring flex, and the low friction additive infused material reduces surface friction to an absolute minimum.
CRANK FEATURES
- Aerodynamically designed to reduce turbulence and separation around the spider, chainring and crankarm.
- 144mm BCD for track and road with 6mm thick chainrings, improving power transfer by eliminating any chainring flex.
- 124.5mm Q factor. Narrower than nearly every crankset currently on the market.
- Adjustable crankarm length between 145-160mm and 160-175mm at 2.5mm increments for each crank size. Also available in fixed crank length.
- Optional - road option comes with low friction additive infused 1x narrow-wide chainring in 58/60/62/64T.
- Optional - track option comes with low friction additive infused 1/8” track chainring in 58/59/60/61/62/63/64/65/66T.
- Stepped chainring design keeps the chain outer plates flush with the chainring to reduce air-flow separation with paired with our crank specific chainrings.
- Interchangeable spindle sizes.
- Compatible with all frames that run BSA, ITA,BB30, PF30, BBRight, BB30a, PF30a, BB90, BB86, Evo386, T45, T47/68, T47/86 bottom brackets.
- Laser etched WattShop logo to the drive side and non-drive side.
A full crankset consists of:
- 1x drive side and non-drive side arms
- 1x drive side dome cover
- 1x spindle
- 1x pair of pedal inserts and plates
- 1x retention bolt and washer
- 1x set of chainring bolts (male only)
- 1x set of hardware
- OPTIONAL 1x 6mm track or 6mm 1x chainring
