Set of 2 Alugear Aero road bike chainrings for Shimano, 12-speed, 110x4 BCD

Optimise the performance of your drivetrain with the Alugear Aero road bike chainring set (2-piece) for Shimano, 12-speed, 110x4 BCD. Designed for Shimano Dura-Ace, Ultegra and 105 cranksets in 2x12-speed configurations, these chainrings combine extreme lightness, stiffness and aerodynamics. 

Precision-machined from 7075-T6 aluminium using CNC technology, they are amongst the lightest chainrings on the market whilst offering excellent durability. Their specific tooth profile ensures smooth, quiet and precise gear changes, even under heavy load. The Aero design enhances the bike’s visual integration and aerodynamic performance, making them ideal for road cycling, racing and time trials. Compatible with 12-speed Shimano and KMC chains, these chainrings guarantee optimal performance when used as an Alugear pair.

Manufactured in Poland to the highest standards, they will appeal to cyclists seeking the best balance of performance, weight and reliability.

Technical specifications:

- Type: Set of 2 Aero
road chainrings - Brand: Alugear
- Use: Road / Time trial
- Drivetrain: 2x12-speed

Compatibility:

Shimano 12v crankset, 110 mm centre-to-centre, asymmetrical (4-arm)
- Shimano 105 FC-R7100
- Shimano Ultegra FC-R8100
- Shimano Dura-Ace FC-R9200
- Shimano FC-R8100-P with power metre
- Shimano FC-R9200-P with power metre

Compatible chains:
- Shimano 12-speed
- KMC 12-speed

Available combinations:
- 48-34 teeth
- 50-34 teeth
- 52-36 teeth
- 54-40 teeth
- 56-40 teeth

Chainring positions:
- Outer: 48T / 50T / 52T / 54T
- Inner: 34T / 36T / 40T

Materials and manufacture:
- 7075-T6 aluminium
- High-precision CNC machining
- Anodised finish

Weight:
- Outer chainring 48 teeth: 100 g
- Outer chainring 50 teeth: 112 g
- Outer chainring 52 teeth: 127 g
- Outer chainring 54 teeth: 143 g
- Outer chainring, 56 teeth: 152 g
- Inner chainring, 34 teeth: 26 g
- Inner chainring, 36 teeth: 29 g
- Inner chainring, 40 teeth: 40 g

Installation:
- Centre distance: 110 mm asymmetrical BCD Shimano
- Maximum tightening torque: 10 Nm
- Tool required: 5 mm Allen key

Contents of delivery:
- 1 Aero outer chainring
- 1 inner chainring
- Screws not included
- Aero cover not included

FAQ – Frequently asked questions:

1. Which Shimano cranksets are these chainrings compatible with?

They are compatible with the following Shimano cranksets: FC-R7100, FC-R8100, FC-R9200, as well as the power metre versions FC-R8100-P and FC-R9200-P.

2. Can I use just the outer or inner Alugear chainring?

No. To ensure optimal drivetrain performance and precise gear changes, Alugear recommends using both chainrings together.

3. Are these chainrings compatible with KMC chains?

Yes, they are compatible with Shimano 12-speed and KMC 12-speed chains.

4. What are the advantages of 7075-T6 aluminium?

This material offers an excellent stiffness-to-weight ratio, high wear resistance and durability suitable for intensive competitive use.

5. Are the mounting screws supplied?

No, the mounting bolts and nuts must be purchased separately. Alugear recommends using its own specific fasteners for optimal installation.