Road, climbing, racing, power meter, 1x, gravel, triathlon or time trial: the Aldhu Carbon platform lets you build a very light setup without locking yourself into one chainring combination.
Carbon crank arms, a 30 mm aluminium axle and Rotor's modular architecture allow the crankset to evolve with your fitness, terrain or bike. Prioritise low weight, climbing, power data or very large chainrings while keeping the same component family.
*Indicative or verified weights depending on crank length, axle, chainrings and hardware.
Aldhu Carbon is not just about saving a few grams. Its real strength is the combination of low weight, stiffness, gearing choice and the option to add a spider-based power meter.
Every version retains the same core qualities, but each one serves a different priority. This is the selection order we recommend.
The best option when you want precise control over your gearing and the freedom to change it later. It covers classic road, racing, high-speed and selected SRAM AXS configurations.
The natural choice for minimising the weight of a modern road bike. The one-piece CNC-machined Spidering combines low mass, stiffness and accurate front shifting.
The Aldhu Carbon INspider 2.0 is one of the most coherent configurations in Rotor's entire range. It pairs the carbon crank arms with a power meter integrated into the spider, protected from impacts and perfectly centred in the drivetrain.
For most riders, it is easier to own than a system spread across several components: long rechargeable battery life, direct head-unit connectivity, stable spider-based measurement and a wide choice of chainrings.
A clean, light and quiet drivetrain for 1x road or fast gravel. The Universal Tooth profile provides secure chain retention without a guide in most applications.
For time trials, triathlon and riders able to exploit very large chainrings. This version prioritises stiffness, chainline and aerodynamic integration.
Weight changes significantly with chainring size, crank length, axle and hardware. The figures below still provide a useful comparison between the main builds.
| Configuration | Indicative / verified weight | Priority | Recommended use |
|---|---|---|---|
| Aldhu Carbon crank arms only | ≈ 250–260 g | Weight reduction | Upgrade an existing modular Rotor crankset |
| 1x Universal Tooth, round 42T | 456 g verified | Lowest weight | 1x road, fast gravel |
| 1x Universal Tooth, round 50T | 491 g verified | Speed + simplicity | Fast 1x road riding |
| Direct Mount 48/31 Q-Rings, 170 mm | 538 g verified | Climbing | Mountain passes, long sportives, high cadence |
| Spider Mount 50/34 Q-Rings | ≈ 542 g verified* | Versatility | Road, climbing and future gearing changes |
| Spider Mount 52/36 | ≈ 576 g verified* | Sportive | Fast road riding, rolling terrain and group rides |
| Complete Aldhu Carbon INspider 2.0 | ≈ 640 g* | Data + performance | Training, racing and pacing |
| Aldhu Carbon Aero, 54 to 58T | Varies by build | Aerodynamics | TT, triathlon and high-speed riding |
*Exact weight varies with crank length, chainring shape and size, axle and hardware. Check each product page for the measured configuration.
The best crankset is not the one with the largest outer ring. It is the one that lets you stay close to your efficient cadence on the roads you actually ride.
There is no universal answer. The advantage of the Aldhu Carbon platform is precisely that you can choose, test and later evolve the build without replacing the entire crankset.
A crankset this modular should be selected from your terrain, cassette, cadence and goals rather than from a specification sheet alone.
