Rotor Cranks USA, Q-Rings, Rotor System





RS4X MTB Steel

Steel splined spindle
Integrated bottom bracket
Stock chainrings: 24/34/44
Material: ALU 7075 CNC
$758.00 shipped


1280g. All RS4X models come with a 30-day Guarantee, free UPS ground shipping/insurance to any continental U.S. address ($12 value), and a two year full warranty.

The chainline of the RS4x MTB crankset is 50mm. You can use the RS4X MTB crankset for a single chainring version by installing the 34T on the middle position and use a RS4X bash guard that mounts on the outer position, and a blank (24T chainring with the teeth machined off) for the inner position. Click here for product details.
Custom Build your RS4X
Crank length
Inner chainring
Middle chainring
Outer chainring
Bottom bracket




RS4X MTB Titanium


Titanium splined spindle
(80g lighter than steel)
Integrated bottom bracket
Stock chainrings: 24/33/44
Material: ALU 7075 CNC
$1015.00 shipped


1200g. All RS4X models come with a 30-day Guarantee, free UPS ground shipping/insurance to any continental U.S. address ($12 value), and a two year full warranty.

The chainline of the RS4x MTB crankset is 50mm. You can use the RS4x MTB crankset for a single chainring version by installing the 34T on the middle position and use a RS4X bash guard that mounts on the outer position, and a blank (24T chainring with the teeth machined off) for the inner position. Click here for product details.
Custom Build your RS4X
Crank length
Inner chainring
Middle chainring
Outer chainring
Bottom bracket



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