Zipp 1Zero HiTop SW Rear Wheel 29 12 x 148mm Center Lock XD Tubeless Standard TyreWiz A1 CheckoutSpec= Ultra Torque Spindle The tread and profile take The tread and profile take advantage of Pirelli’s extensive motorsport experience: the lightning bolt pattern design features narrow angles at the center of the footprint to promote regular wear and progressive feedback while the wider lateral angles provide solid behavior and responsiveness at the end of the lean The updated Spinner Knob on our patented Speed Ratchet clamp head makes operation even faster The 1Zero HiTop SW also comes with the TyreWiz tire pressure monitoring system so you’ll always have your tire pressure dialed in for optimal performance The 1Zero HiTop SW carbon rim complies with the terrain thanks to Zipp’s proprietary HITOP Technology for carbon layup