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Round 1-speed for 12sp 110 BCD 4b Shimano Asymmetric Road
Reduced price:
€90.25
Tax included
Single chainring designed for time trial and triathlon performance. Available up to 58 teeth, it offers maximum mechanical efficiency and perfect compatibility with Shimano 12-speed cranks (R7100, R8100, R9200). Combine it with the ALUGEAR AERO cover for a clean, aerodynamic setup and optimal stiffness.
Chainring
ALUGEAR 1x12 Chainring – 110x4 Asymmetric for Shimano Cranks
The ALUGEAR 1x12 narrow-wide chainring is designed for time trial and triathlon riders who seek maximum aerodynamic efficiency. Removing the front derailleur and small ring improves aerodynamics, reduces weight, and enhances drivetrain smoothness.
Why choose a large single chainring?
Using larger chainrings (54T to 58T) increases mechanical efficiency by reducing chain articulation and friction. This setup delivers smoother power transfer and is ideal for flat or rolling time trial and triathlon courses.
Technical specifications
- Mounting standard: 110 mm BCD 4-arm Shimano asymmetric
- Compatibility: Shimano R9200 / R9200P, R8100 / R8100P, R7100
- Speed: 1x12 (not compatible with 2x systems)
- Material: CNC-machined 7075-T6 aluminum
- Surface finish: hard anodizing
- Technology: Narrow Wide teeth for perfect chain retention
- Offset: varies by size (+3.0 to -1.5 mm)
- Available sizes: 38T to 58T
Chain compatibility
Compatible with Shimano 12-speed HG+, SRAM Flattop 12s, and KMC 12-speed chains. A clutch-type rear derailleur is recommended for optimal chain tension.
Velo-Perso’s opinion
Many riders have been asking for larger time trial chainrings beyond 54T. ALUGEAR finally makes it possible with 56T and 58T options—perfect for triathlon or TT bikes. Pair it with an ALUGEAR AERO Cover for maximum stiffness and aerodynamic performance.
Installation tip: Always use original ALUGEAR bolts (6.5 mm bolts, 7 mm nuts) to protect the cover and ensure optimal tightening.
Manufacturing quality
Each chainring is CNC-machined from a solid 7075-T6 aluminum block and hard-anodized for durability and resistance to impacts. The tooth profile ensures silent, frictionless operation for all 12-speed drivetrains.
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