ROTOR launches a complete new mountain bike crank line: REX.

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.

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.

The aluminum construction of the REX forgoes the use of trendy materials and stays true to its goal of delivering unrivalled performance at its weight level. By doing so it offers aluminum stiffness at a lower weight than most high end carbon cranks. With the use of our Trinity Drilling System to hollow out the crank arms combined with the application of our stiffness and compatibility with most frames (UBB30 axle), it offers a new level of performance for quality bike builds of any brand, model and type.

ROTOR's trinity drilled crank arms resist bending and twisting forces better than classic hollow tube crank designs can. ROTOR’s crank arms are stiffer than the competitions products due to our Trinity Drilling System and material. This process drills three full-depth holes from axle to pedal. This gives our crank arms superior rigidity and an exceptional stiffness-to-weight ratio.

The UBB (Universal Bottom Brackets) concept is simple: it fits everything. UBB is a design concept that Rotor applies to all its cranksets to make them compatible with all BB standards and frames on the market. It allows installation of almost any crank with a 30 or 24mm axle from ROTOR on the bike you have, regardless of its BB type.