Birzman Hex Key Set CheckoutSpec= 60.5mm Monarch Plus A1/B1 Rings 42Number of Chainrings Chain 40 Tubeless Technology Tubeless CheckoutSpec= Includes Bracket and Titanium Bolts Size:130 B-VR7051-B

Birzman Hex Key Set CheckoutSpec= 60.5mm Monarch Plus A1 B1 Rings 42Number of Chainrings Chain 40 Tubeless Technology Tubeless CheckoutSpec= Includes Bracket and Titanium Bolts Size:130 B VR7051 B Rings 42Number of Chainrings Chain Retaining SingleDrivetrain Speeds 12Drivetrain Speeds 13Chainline Hub Compatibility 135 142 Road Disc Hubs < 415 mm ChainstayChainline Hub Compatibility 135 142 Road Disc Hubs > 415 mm ChainstayColor Natural CarbonCrank Length (mm) 170Crank Intended Use GravelBB Included NoPedal Spindle 9 16"Spindle Interface Type SRAM DUBDefined Color Carbon Air Release Yes Gauge Type No Primary Color Black Pump Barrel Material Aluminum Pump Head CLIK Valve Presta Schrader