Shimano HG12 1x12 104 BCD Chainrings

Our Shimano HG12-specific chainring tooth profile is mated with our proven narrow-wide tooth pattern to help retain the chain on the front ring during all types of riding. Utilizing the most common bolt pattern; 104mm BCD. Specifications: 104mm Bolt Diameter Circle (104 BCD) Bottom Bracket Types: BB30   GXP    Boost Chainline: This varies with your crankset 30T: ~50mm on a 2×10 mid-ring mounting position 32T, 34T, 36T, 38T: ~52mm on a 2×10 mid-ring mounting position Machined from solid 7075 T6 Aluminum Anodized Black with Laser Etched Graphics Compatible with Shimano 12-speed drivetrains only Precision CNC Machined in Whistler, B.C. Weight: 28T – 45g 30T – 44g 32T – 40g 34T – 44g 36T – 58g 38T – 66g