Classified Aero Chainring - 54t DropStop B fits SRAM Flattop T-Type 12/13-Speed Chains Compatible all 11-Speed Chains BLK MFPN=CR4UPA-106 Compatible with all 9 speed

Compatible with all 9 speed systems

Use it as a rear tire paired with a more aggressive front tread

}SRAM RED eTap AXS Replacement Brake/Shift Lever Blade - Right/Rear

Rings 50/37Number of Chainrings DoubleDrivetrain Speeds 12Chainring BCD Direct Mount SRAM 8-BoltChainline/Hub Compatibility 135/142 Road Disc Hubs < 415 mm ChainstayChainline/Hub Compatibility 135/142 Road Disc Hubs > 415 mm ChainstayColor CarbonCrank Length (mm) 175Crank Intended Use RoadBB Included NoPedal Spindle 9/16"Spindle Interface Type SRAM DUBDefined Color Carbon

Turn to Value HD for some extra beef

Classified Aero Chainring - 54t DropStop B fits SRAM Flattop T-Type 12/13-Speed Chains Compatible all 11-Speed Chains BLK MFPN=CR4UPA-106 Compatible with all 9 speedTake your cycling to the next level with the Classified 1x Aero Chainring engineered for peak performance on both road and gravel. Designed with a sleek closed face design the Chainring delivers exceptional aerodynamic efficiency making it one of the fastest options available crafted for riders who demand nothing but the best. Tooth Count 54 Drivetrain Speeds 13 Round or Oval Round Material Aluminum Color Black Weight 216 Defined Color Black