Rotor Rex 1 Crankset

MSRP : USD 450.00

Price : USD 450.00

crank length*


ROTOR launches a com plete new mountai n bike crank line: REX.

Knowledge is success

The lightest and stiffest crank for mountain bike.

The REX1 is ROTOR’s most technologically advanced and lightest UBB30 crankset. It brings ROTOR technology to the mountain bikes on the market, irrespective of their BB type: It is compatible with BSA (68 & 73), BB86, BBB89, BB92, BB30, and BBRight bikes.

REX resists rotational and bending forces

The REX uses a refined and lighter version of the Trinity Drilling System (TDS) hollow construction. This allows the crank to resist rotational and bending forces better than a simple hollow tube construction can.

Rotor QX1 chainring not included.


  • 489 grams (170 mm).
  • 170mm, 172mm, and 175mm.
  • 100% CNC Machined, Al 7055 T6.
  • Q-Factor 163 mm, Chain line 56mm (REX 1.1).
  • Ultra stiff 30mm Aluminum UBB axle; compatible with BSA, ITA, BB86, BB30, BB30 PF, and BB386 Evo frames.

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