-€110.00
Rotor Aldhu Carbon 1x Universal Tooth – Road & Gravel (38–54T)
Reduced price:
€569.00
Tax included
Rotor Aldhu Carbon 1x Universal Tooth — a road & gravel single-ring build focused on efficiency and ultra-low weight.
- Use cases: 1x road (original build; Shimano 12-speed or SRAM AXS 12-speed recommended) & gravel (light + efficient).
- Chainrings: 38, 42, 44, 46, 48, 50, 52, 54T — round or 12% Q-Rings.
- Verified weight: 456 g (42T round); 491 g (50T round).
- Axle: 30 mm Standard (road) or Offset (gravel) for an optimized chainline.
- Frame standards: BSA, ITA*, BB386 EVO, BB86, BBright, T47 (internal/external), PF30, BB30
*with an appropriate 30 mm bottom bracket. - Chains: Shimano / SRAM / KMC / Yaban — 10/11/12/13-speed (Universal Tooth profile; secure retention without a guide).
- Crank lengths: 155 / 165 / 170 / 172.5 / 175 mm.
Recommended 30 mm bottom brackets: CyclingCeramic BSA30 · CyclingCeramic BB86/41-30 · CyclingCeramic T47/30 Internal 86.5 mm
Included: 30 mm axle (Standard or Offset), Aldhu Carbon crank arms (155–175 mm), and a single chainring (round or 12% Q-Rings, 38–54T).
Axle type
Arm length
Chainring
NOQ/QRINGS
Aldhu Carbon 1x Universal Tooth: road & gravel speed with minimalist simplicity
The Rotor Aldhu Carbon 1x uses a Universal Tooth (narrow-wide) profile for secure chain retention without a guide, combining stiff carbon arms with a 30 mm axle to maximize drivetrain efficiency. It’s a light, quiet, and responsive single-ring setup—equally at home on fast road rides or on rolling gravel terrain.
Key specs
- Chainring sizes: 38, 42, 44, 46, 48, 50, 52, 54T (round or 12% Q-Rings).
- Verified by Velo-Perso: 456 g (complete, 42T round); 491 g (complete, 50T round).
- 30 mm axle: Standard for road; Offset for gravel (wider chainline, improved tire/chainstay clearance).
- Drivetrain compatibility: Shimano / SRAM / KMC / Yaban — 10/11/12/13-speed.
- Crank lengths: 155 / 165 / 170 / 172.5 / 175 mm.
Pick the right tooth count
| Use case | Suggested sizes* | Typical cassettes |
|---|---|---|
| Fast/rolling road | 46 – 54T | Shimano 11-30/34; SRAM 10-28/33 |
| All-round gravel | 38 – 46T | 10-36, 10-44, 11-40/42 |
*Adjust to your cassette, terrain and power. 12% Q-Rings can smooth torque and help on punchy climbs.
Frame & bottom bracket compatibility (30 mm axle required)
- Threaded: BSA (68 mm), ITA*
- Press-fit: BB386 EVO, BB86, BBright, T47 internal & external, PF30, BB30
For a drivetrain feel that matches this crank’s efficiency, we recommend CyclingCeramic:
– BSA30 (30 mm axle) | BB86/41-30 | T47/30 Internal 86.5 mm.
*ITA is supported when using a suitable 30 mm bottom bracket.
Chainline & axle choice: Standard (road) vs Offset (gravel)
- Standard: road-biased chainline, optimized with 11-30/34 or 10-28/33 cassettes.
- Offset: wider chainline for gravel (target ≈ ~47 mm depending on frame) and improved tire/chainstay clearance.
Drivetrain & chains
The Universal Tooth profile works with Shimano, SRAM, KMC and Yaban chains across 10/11/12/13-speed, delivering confident retention without a chain guide for most riding scenarios.
Verified weights (Velo-Perso)
- 456 g: complete crank with 42T round.
- 491 g: complete crank with 50T round.
Actual weight may vary with bolts, crank length and axle version.
What’s included
- 30 mm axle: Standard (road) or Offset (gravel).
- Aldhu Carbon crank arms: 155 / 165 / 170 / 172.5 / 175 mm.
- Single chainring: round or 12% Q-Rings, 38–54T.
Velo-Perso’s take
If you want a light, punchy and quiet road setup (no front mech) or a high-efficiency gravel build for rolling terrain, the Aldhu Carbon 1x is a perfect fit. Pair it with a CyclingCeramic bottom bracket for lasting smoothness and top-tier efficiency.
Install tips
- Select the axle (Standard road / Offset gravel) based on chainline needs and tire clearance.
- Size your chain length on the largest rear cog for 1x.
- Follow Rotor torque specs; use carbon assembly paste where appropriate.
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