SRAM Force 2x Chainring Kit 50 37t 2x12 Speed 8 Bolt Direct Mount Black D2 CheckoutSpec= IS41 28.6 IS52 40 (Short) Black Lumens Rear 260 Recharge Type Lumens Rear 260 Recharge Type USB Hope RX Spiderless Direct Mount Retainer chainrings are specifically designed for use with Hope RX cranksets and feature a narrow wide tooth profile to keep the chain where it should beOnly for use with Hope RX cranksets Chainline Hub Compatibility 130 Hubs Chainline Hub Compatibility 135 142 Road Disc Hubs < 415 mm Chainstay Chainring BCD Direct Mount SRAM Color Black Defined Color Black Direct Mount Type Direct Mount SRAM Drivetrain Speeds 12 Material Aluminum Ring Position Type Inner Ring Position Type Outer Round or Oval Round Tooth Count 50 37 keyword search AXS And the technology that has been packed in makes it SRAMs longest lasting chainring set yet