Options:700 12 X 100mm Center-Lock Tubeless BLK B1700 12 x 142mm Center-Lock XDR Tubeless BLK B1The 808 Firecrest Tubeless Disc-wheels are all about science to achieve speed. Thats the perfect approach for Zipps stiff deep-rim choice for criteriums road racing or any kind of hammer-fest. At 80mm deep its rim is designed to make you faster in every way. Zipps Total System Efficiency design approach or TSE infuses the 808 Firecrest with new features including a huge drop in weight from its previous iteration well more than 280 grams. Also the wheel is designed with a hookless and tubeless rim profile and 23mm internal width. Thats ideal for running wider tires at lower pressure for reduced rolling resistance and greater cornering grip.TSE attacks the four primary barriers to speed: Wind Resistance Gravity Rolling Resistance and Vibration LossesFull Carbon Firecrest rim shape provides high aero efficiency and crosswind stabilityABLC Technology uses a complex dimpling pattern to improve aero efficiencyOptimized for tubeless tires with the option to run Tubeless or tubeless ready tires with tubesZR1 Disc Brake hub features a better seal design for improved durabilityBuilt with Sapim CX Sprint J-bend spokes