ALUGEAR Round 1X Chainring for Shimano 12-speed Cranks

The ALUGEAR Round 1X is a round Narrow-Wide chainring for road, time trial and gravel bikes with a 1×12 drivetrain. CNC-machined from 7075-T6 aluminium, the chainring is designed for Shimano cranks with a 110 mm asymmetric 4-bolt interface, combining low weight, precise machining and reliable chain retention.

• Designed for road, time trial and gravel bikes
• For 1×12 drivetrains
• Compatibility: Shimano Dura-Ace R9200, Ultegra R8100 and 105 R7100 cranks
• 110 mm Shimano Asymmetric 4-bolt interface
• Narrow-Wide tooth profile for reliable chain retention
• CNC-machined from 7075-T6 aluminium
• Anodised finish
• Available in sizes 38T–62T
• Available in several colours
• Designed for use in a 1x system without a front derailleur

Technical specifications:

• Material: 7075-T6 aluminium
• Manufacturing: CNC machining
• Finish: anodised
• Tooth profile: Narrow-Wide
• Offset: 38T–52T: 3.0 mm; 54T: 2.0 mm; 56T: 1.0 mm; 58T: 0.0 mm; 60T: -1.0 mm; 62T: -1.5 mm
• Diameter: 38T – 161.3 mm; 40T – 171.0 mm; 42T – 179.0 mm; 44T – 187.0 mm; 46T – 195.5 mm; 48T – 202.4 mm; 50T – 210.4 mm; 52T – 219.0 mm; 54T – 227 mm; 56T – 235 mm; 58T – 243 mm; 60T – 251 mm; 62T – 259 mm
• Weight: 38T – 61 g; 40T – 72 g; 42T – 78 g; 44T – 86 g; 46T – 94 g; 48T – 103 g; 50T – 109 g; 52T – 119 g; 54T – 130 g; 56T – 142 g; 58T – 152 g; 60T – 168 g; 62T – 189 g

Compatibility:

• Shimano 12-speed HG+ chains
• SRAM 12-speed Flattop chains
• KMC chains
• Shimano Dura-Ace R9200 12-speed cranks
• Shimano Ultegra R8100 12-speed cranks
• Shimano 105 R7100 12-speed cranks
• Not suitable for 2x systems

Recommendation: For improved chain retention, the manufacturer recommends using a clutch-type rear derailleur. When installing a new chainring, fitting a new chain is also recommended. ALUGEAR original bolts and nuts can be used for installation.

Package contents: 1 × ALUGEAR Round 1X chainring