SRAM Flat Mount Disc Caliper Bracket Bolts 17mm Titanium CheckoutTitle=SRAM Post Bracket 20 P 2 Disc Brake Adaptor - For 200mm and 220mm Rotors Only Wolf Tooth has a Centerlock

Wolf Tooth has a Centerlock Rotor Lockring - Internal Spline that is thinner

The number and letter refer to the mm offset and direction from the mounting face to the centerline of the teeth: For use with GXP cranks and BB30 Long Spindle standard 49mm chainline

}Magura MDR-P Disc Brake Rotor - 180mm 6-Bolt Silver/Black

}Selle Italia SLR Boost Gravel Superflow Saddle - Titanium Black L3

With the addition of a clutch-equipped Shadow+ rear derailleur

SRAM Flat Mount Disc Caliper Bracket Bolts 17mm Titanium CheckoutTitle=SRAM Post Bracket 20 P 2 Disc Brake Adaptor - For 200mm and 220mm Rotors Only Wolf Tooth has a CenterlockSRAM Flat Mount Disc Caliper Bracket Bolts 17mm Titanium. SRAM Flat Mount Bracket Bolts are for mounting SRAM flat mount calipers.