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Rotor REX 1.1 cranks & Rotor QX1 Q-Ring chainring


Egg-shaped chainrings go enduro

ROTOR HAVE GONE back to the drawing board for their new single-ring mountain bike crankset, the REX 1.1. They have updated  heir trademark oval chainrings with a new thick/thin tooth profile and made the crank arms stronger and lighter than ever.

The cranks are constructed using the same Trinity Drilling System hollow construction as the company’s latest road models, where each arm is CNC machined from a bar of 7055 aluminium and then has three internal holes drilled throughout its length to save weight. At 485g a pair, they’re some of the lightest alloy arms on the market.

It’s the egg-shaped Q-Ring chainring that really makes these cranks stand out though. The elliptical shape is said to minimise dead spots in your pedal stroke, increasing power and acceleration, reducing muscle fatigue and encouraging smoother pedalling that should give improved traction. The REX’s QX1 Q-Ring also has the latest alternating thick/thin tooth profile designed to keep your chain where it needs to be over rough terrain.

The rings are available in 28, 32, 34 and 36t sizes, with adapters available aftermarket for non-REX cranks.

PRICE:
Rotor REX 1.1 cranks 480$
Rotor QX1 Q-Ring chainring 120$

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