-€220.10
Online only
Aldhu Carbon Directmount 12S Shimano 48/31 50/34 52/36
Reduced price:
€499.90
Tax included
At a glance — Rotor Aldhu Carbon 12-Speed Direct Mount
- Verified weight: 538 g (170 mm, 48/31 Q-Rings)
- Chainring options (2x): 48/31, 50/34, 52/36 — round NOQ or oval Q-Rings
- Crank lengths: 155, 165, 170, 172.5, 175 mm
- Compatibility: Shimano 11/12-speed (Di2/mech), SRAM 11-speed (eTap/mech), Shimano GRX 820
- Direct-Mount Spidering: Universal Tooth, updated aesthetic
- OCP: 5 positions for optimal oval-ring alignment
Axle options
| Axle | Chainline | Q-factor |
|---|---|---|
| Road (standard) | 43.9 mm | 147.5 mm |
| Gravel (offset) | 46.5 mm | 152.5 mm |
- Road: compact stance width and ideal 2x road chainline.
- Gravel: extra tire/chainstay clearance and a slightly wider stance for mixed terrain.
Axle
Spidering
Arm length
Which bottom bracket to use with the Aldhu Carbon 12V Direct Mount crankset?
The Rotor Aldhu Carbon 12V Direct Mount crankset is designed exclusively around a 30 mm axle. As such, it requires a bottom bracket with a 30 mm internal diameter — which is different from the standard 24 mm bottom brackets found on most OEM Shimano or Sram cranks.
No worries — we offer high-end ceramic bottom brackets for nearly every frame standard. Each option below is optimized for performance, durability, and long-distance efficiency. Here are our recommended models for this crankset:
- BB86 frames (Canyon, Scott, Giant, Bianchi…): BB86 30 mm — CyclingCeramic or Bikone
- BSA threaded frames: BSA30 — CyclingCeramic or Bikone
- T47 internal 86.5 mm frames (e.g. Trek): T4730 — CyclingCeramic or Bikone
- BBright frames (Cervélo): BBRight 30 mm — CyclingCeramic
- ITA frames (Pinarello, Colnago C60…): ITA30 — CyclingCeramic
If you're unsure about your frame standard, feel free to contact us — we'll help you choose the perfect bottom bracket for your bike and riding style.
Rotor Aldhu Carbon 12-Speed Direct Mount: lightweight, efficiency & wide compatibility
The Rotor Aldhu Carbon 12-Speed Direct Mount crankset is a direct answer for riders who want to combine extreme low weight, modern drivetrains and a clean, integrated design. Offered here as a double with three chainring options (48/31, 50/34, 52/36), it suits dedicated climbers as well as strong “rouleurs”.
Thanks to its CNC-machined Spidering mounted directly to the axle, this crankset eliminates traditional chainring bolt hardware and saves precious grams. The result? A verified weight of just 538 g in 170 mm with 48/31 Q-Rings. The Spidering’s silhouette has also been refreshed to visually match Shimano 12-speed groups while remaining 100% compatible with Shimano 11/12-speed and SRAM 11-speed, whether mechanical or electronic.
Which axle should I choose? Road “standard” vs Gravel “offset”
The Aldhu Carbon is available with two axles: Road (standard) for road frames and Gravel (offset) to provide extra chainstay/tire clearance and a more outward chainline—ideal on modern gravel frames.
| Axle version | Chainline | Q-factor | Recommended use |
|---|---|---|---|
| Road (standard) | 43.9 mm | 147.5 mm | Road/endurance frames, ideal chainline in 2x |
| Gravel (offset) | 46.5 mm | 152.5 mm | Gravel frames, extra tire/chainstay clearance, outward chainline for 12-speed mixed terrain |
- Road (standard): best on road frames to keep a compact Q-factor and perfect 2x alignment (48/31, 50/34, 52/36).
- Gravel (offset): +2.6 mm chainline and a wider Q-factor (≈ +5 mm). Recommended if your frame needs more chainstay/tire clearance or you run larger tires.
- Ergonomics: if you’re sensitive to crank stance width, choose the Road axle for pure road; use the Gravel axle when the frame/terrain demands it.
🔧 Technical specifications
- Weight: 538 g verified in 170 mm with 48/31 Q-Rings
- Chainring options: 48/31, 50/34, 52/36 (NOQ round or Q-Rings oval)
- Crank lengths: 155, 165, 170, 172.5, 175 mm
- Drivetrain compatibility: Shimano 11/12-speed (Di2 or mechanical), SRAM 11-speed (eTap or mechanical), Shimano GRX 820
- Spidering: Direct-Mount Universal Tooth – updated aesthetic
- OCP adjustment: Yes – 5 positions to optimise pedalling with oval rings
- Axles: Road (standard) — chainline 43.9 mm, Q-factor 147.5 mm | Gravel (offset) — chainline 46.5 mm, Q-factor 152.5 mm
If you care about refining your pedal stroke, the compatibility with Rotor Q-Rings is a major plus. With OCP (Optimum Chainring Position) you can rotate the Spidering through five positions to match your pedalling style. The effect: it feels like a smaller ring when your leg is weaker and a bigger ring when it’s stronger—delivering comfort and efficiency gains, especially in the mountains or on long rides.
Velo-Perso.com’s take
This crankset is arguably one of the best options for mountain-focused sportives. In 48/31 and just over 500 g, it helps you tackle steep gradients without adding weight. On a road frame, choose the Road (standard) axle to keep a compact Q-factor and ideal 2x chainline. On a gravel frame or when clearance is tight, pick the Gravel (offset) axle to secure tire/chainstay space and 12-speed alignment off-road. Racers chasing a light, punchy build will often prefer 52/36. Designed for the 2025 generation of groupsets (Shimano 105, Ultegra, Dura-Ace 12-speed), it integrates perfectly on today’s high-end bikes.
Why this bundle instead of buying parts separately?
You get a preferential price. The package includes the carbon crankarms, axle and Spidering — pre-assembled with the latest Rotor 12-speed chainrings. Beyond the weight savings, you benefit from tighter functional and visual integration.
Who is it for?
It targets a performance-minded rider who rides regularly in the mountains or on rolling terrain, uses a modern Shimano or SRAM groupset, and wants to drop weight without sacrificing efficiency. It also appeals to racers and bike-fit enthusiasts thanks to the wide crank-length range and unique OCP adjustment. Axle choice: Road (standard) for road frames; Gravel (offset) if your frame/tire choice needs extra clearance or a more outward chainline.
Comments (2)
Grade
Shipping
We use a dynamic pricing grid via Packlink. Prices are adjusted in real-time based on weight, delivery address, and chosen service.
Chronopost (Europe)
This is our most reliable carrier if you're looking for a quick delivery. We have daily collections from Chronopost, which is insuring the quickest shipping.
Mondial Relay
The relay point service is available for some EU countries at low rates. It's reliable and economical, you can select your pick up store after entering your delivery address.
USA Deliveries:
We have a flat rate of 34,90€-USD40 with priority mail express. This a reliable express shipping with an average of 7 days of transit.
Asia Deliveries:
We manage these deliveries through the Universal Postal Service (EMS). The shipping cost is €34.90 for most non-European countries. Delivery times are generally between 4 to 12 days.
Returns:
Returns are accepted and are at your expense (unless it is our mistake). Returns must be made within 14 days of receiving your package.
For more details, please visit our shipping page
