• ALUGEAR GRX 12-speed single chainring, black, front view
  • ALUGEAR GRX 12-speed single chainring, black, rear view
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ALUGEAR

ALUGEAR GRX 11/12-speed single chainring

The ALUGEAR GRX 12-speed single chainring is designed for 1x11- and 1x12-speed gravel drivetrains. Its compatibility with Shimano cranksets with an asymmetric 4-arm 110... Read more
80,00 €
80,00 €
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Description

The ALUGEAR GRX 12-speed single chainring is designed for 1x11- and 1x12-speed gravel drivetrains. Its compatibility with Shimano cranksets with an asymmetric 4-arm 110 BCD bolt pattern allows it to be fitted to GRX FC-RX820, RX810, RX610 and RX600 cranksets.

Made from 7075-T6 aluminium, this chainring is CNC machined to keep weight down while maintaining good strength. The anodised finish provides protection against impacts and abrasion.

The narrow-wide tooth profile improves chain retention, limits noise and reduces wear. Compatible with Shimano, SRAM and KMC 10-, 11- and 12-speed chains, it is for single-chainring setups only, without a front derailleur.

Technical information

Type: Single chainring
Drivetrain: 1x11 and 1x12-speed
Use: Gravel
Shape: Round
Colour: Black
Material: 7075-T6 aluminium
Manufacture: CNC machined
Finish: Anodised
Tooth profile: Narrow Wide
Bolt circle diameter: 110 BCD
Mounting: 4-arm
Standard: Asymmetric Shimano GRX 110 BCD

Compatible cranksets:
Shimano GRX 12-speed FC-RX820, FC-RX610
Shimano GRX 11-speed FC-RX810, FC-RX600

Compatible chains:
Shimano 10-, 11- and 12-speed
SRAM 10-, 11- and 12-speed
KMC

Front derailleur: Not compatible / use without a front derailleur
Configuration: 1x single-chainring only; not compatible with 2x setups

Offset by tooth count:
38T to 48T: 2.0 mm
50T: 1.0 mm

Available tooth counts: 38T, 40T, 42T, 44T, 46T, 48T, 50T

Weight by tooth count:
38T: 60 g
40T: 63 g
42T: 66 g
44T: 75 g
46T: 86 g
48T: 92 g
50T: 99 g

Diameter by tooth count:
38T: 161.3 mm
40T: 171 mm
42T: 179 mm
44T: 187 mm
46T: 195.5 mm
48T: 202.4 mm
50T: 210.4 mm

Recommended component: Rear derailleur with a clutch mechanism to improve chain security
Tip: Fit a new chain with the new chainring
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Pricing information

*Recommended retail price from supplier in July 2026