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Rotor REX 2.1 XC1 MTB Crank BCD 76 1x11

Rotor REX 2.1 XC1 MTB Crank BCD 76 1x11

The Rotor REX 2.1 1x10/11-speed crank closes the gap between Rotor's REX 3 and the performance-orientated REX 1 crank, because it is featuring trinity drilled, cold forged crank arms and a 30mm aluminium UBB axle. Furthermore it offers a perfect balance between low weight, rigidity and durability.

The crank arms of the Rotor Rex 2.1 are made of forged and CNC machined 7075 T6 aluminium which have been trinity drilled for a further weight reduction. Rotors axle system has been specifically developed for multiple BB systems. In addition Rotor has extended the compatibility of the Rex 2.1 because now it's equipped with an improved ultra stiff 30mm aluminium UBB axle.

The "UBB System" is not a standard. It's all standards because it allows the installation of almost any 24 or 30mm Rotor axle crank on your bike, regardless of its BB type.

Note: You will find a compatibility chart under "attachments"!

This crank is manufactured using an improved version of RotorŽs proprietary "Trinity Drilling System" technology during manufacture. Due to the larger axle-crank contact area of a BB30 crank, all three holes can be drilled from the axle side of the crank arm, allowing further optimization of wall thicknesses. It improves both the weight and the weight-rigidity ratio of the crank arm.

The REX 2.1 XC1 MTB cranks can be used with Rotor QX-Rings (not included in delivery), noQ rings and also be used with any standard chainrings for 76mm bolt circle diameter.

The precisely adjustment of the cup preload is achievable because of an compression ring with nut.

Q-Factor: 163mm, Chain line: 56mm

Symbolic picture: The picture shows the crank inclusive chainring, while the delivery includes only the crank.
Fitting for derailleur: 11-speed
Included in delivery: without bottom bracket cups and chainrings
crank, aluminium chainring bolts, spacer
Material: 7075 T6 aluminium
Weight supplement: at 170mm crank arm length, without BB and chainrings)
(manufacturer's specs

Fact Sheet of Rotor REX 2.1 XC1 MTB Crank BCD 76 1x11

Product Name: Rotor REX 2.1 XC1 MTB Crank BCD 76 1x11
Manufacturer: Rotor
Item Code: ROT165244
activity: Cycling
material: Aluminium
usage bikesport: MTB
bottom bracket axle profile: 30mm Hollow Shaft
MTB - bolt circle diameter: 76mm
chainring mount: Direct Mount + Spider
chain line: 56mm
crank special features: Narrow-Wide
Q-factor: 163mm
Model year: 2020
Color: Black
weight: 511g
Manufacturer page:
Bottom Bracket Compability Chart
(249 kBytes)//ROTOR Bike Components