Search
shop

ROTOR releases new ALDHU® carbon cranks

Combining lower weight, improved stiffness and even more customisable options, ROTOR have released their new range of ALDHU® carbon cranks
Chief Correspondent
Last updated -

After four years of development, ROTOR Bike Components have released their modular ALDHU® carbon cranks.

Lighter and stiffer than their aluminium predecessors, they have also increased the number of modular options available to allow riders to perfectly customise their own ride. As the introduction of disc brakes has pushed up the overall weight of most road bikes, ROTOR aimed to redress that balance without sacrificing crank stiffness.

ROTOR Aldhu Carbon Cranks

How much lighter?

ROTOR’s first-generation aluminum ALDHU® 172.5 mm crank arms with 50/34 direct mount chainrings weigh in excess of 600g, which is lean enough for extruded, CNC’d cranks. By exploiting the advantages of carbon fibre, the new carbon crank arms shed 100 grams to lower the total weight to 523.5 g for the same crankset combination. At the same time, the cranks’ absolute vertical and horizontal stiffness were increased by 11 percent and 36.1 percent respectively.

Featured crankset combinations

Since no two cyclists are exactly alike, when comfort and/or performance determine the quality of a ride or the outcome of a race, the ability to precisely dial in personal preferences becomes crucial. The ALDHU® Carbon cranks can be combined with different types of spiders, chainrings, and axles to optimize comfort and performance. To guide the selection process, ROTOR has organized possible crankset combinations into four categories: Standard, Superlight, Aero, and Full Aero with 1x and 2x configurations in all except Standard.

ROTOR Aldhu Carbon Cranks

Twin Leg Technology

ALDHU® Carbon crank arms have been designed in combination with ROTOR’s 30 mm axles. The patented interface between crank arms and axle offers a simple assembly but with a firm fit. This design solves a specific problem, which is that power losses are mainly generated by axle torsion under pedaling force. To address this, the robust axle reduces power losses that occur when force is exerted on the left pedal. The balance achieved to minimize these losses is called TWIN LEG TECHNOLOGY.

Rotor Aldhu Spindle

OCP Mount

This technology allows the rider to adjust the orientation of ROTOR’s Q RINGS® oval chainrings by degrees relative to the crank. OCP Mount is based on the combination of three independent elements: axle, right crank arm and spider with oval chainring (or in the absence of a spider, a direct mount Q RINGS®). The patented crank interface for a DM Q RINGS® allows for the most precise adjustment of an oval chainring to date.

ROTOR Aldhu Carbon Crank

With these new benefits built into the crank structure, users who place a premium on choice can customize their cranksets owing to ALDHU®’s modular structure. ROTOR first introduced this concept into its product range in 2017. Since then ROTOR has added components to the ALDHU® category to further extend its customization configurations.

Available upgrades

ALDHU®’s modularity offers cyclists the added advantage to upgrade to the new carbon crank arms if they already use an ALDHU® or VEGAST® crankset. An 8 mm Allen wrench, a pair of ALDHU® Carbon cranks, and two minutes are all it takes to complete this easy upgrade.

ROTOR Aldhu Carbon Cranks

To find out more, visit: https://rotoruk.co.uk/

John Levison
Written by
John Levison
TRI247's Chief Correspondent, John has been involved in triathlon for well over 30 years, 15 of those writing on these pages, whilst he can also be found commentating for events across the UK.
Discover more
tri-fit vortex tri suit review
TRI-FIT VORTEX tri suit review – race day approved performance
Maja Stage Nielsen Kat Matthews Jocelyn McCauley IRONMAN Texas 2023 podium photo credit IRONMAN
PremiumRacing to keep up: Is social media making us train harder?
Cadomotus chronos aero triathlon cycling shoes
The triathlon cycling shoe that promises a 10-watt saving: Cadomotus Chronos Aero triathlon cycling shoes review
Wahoo ELEMNT RIVAL
PremiumTraining to heart rate vs power on the bike
Caroline Pohle Lena Meissner ironman 703 jonkoping sprint 2025
PremiumHow to pace a triathlon to leave it all out there WITHOUT blowing up
latest News
Hayden Wilde wins T100 London 2025
T100 French Riviera 2025: Date, start time, who’s racing and how to watch live
Jeanne Lehair Georgia Taylor Brown Fanni Szalai Supertri Chicago
Supertri Chicago 2025 women’s results: Lehair holds off Olympic star Taylor-Brown
Alberto Gonzalez Garcia wins Supertri Chicago
Supertri Chicago 2025 men’s results: Speedy Gonzalez Garcia STUNS the big names
Jeanne Lehair Supertri Chicago 2025
WATCH AGAIN: Supertri Chicago 2025 as Lehair and Gonzalez Garcia take the wins
Tim Don Supertri Toronto 2025
Tim Don: Watch out for Jonny Brownlee bounce back and Fanni Szalai at Supertri Chicago
triathlon on your terms
Never miss out with our triathlon alerts & digest. Get a dose of adventure & inspiration with Boundless.
The 247 Group

The home of endurance sports

TRI247-LOGO_Primary-Black_RGB-1

CHOOSE YOUR MEMBERSHIP TO BECOME PART OF SOMETHING EPIC

We’re on a mission to elevate the world of endurance sport, becoming your go-to resource for expert training tips and inspiration, unbiased reporting and creating a platform for grassroots voices. But we can’t do it without you on board! Choose a TRI247+ membership option below and become part of something epic.

All plans include a 7-day free trial

£7.95/month

Unlimited access. No ads. A whole library of tips, advice and inspiration at your finger tips, and the chance to shape the future of triathlon journalism.

100+ new articles/month

You’ll also gain access to our other premium websites:

Have an account? Sign in

All plans include a 7-day free trial

£47.95/year
£95.40/year

50% Discount

100+ new articles/month

Unlimited access. No ads. A whole library of tips, advice and inspiration at your finger tips, and the chance to shape the future of triathlon journalism.

You’ll also gain access to our other premium websites:

Have an account? Sign in

Share to...