700x23 Black/Brown Race D Evo4 Bicycle Tire Razor E-Punk also known as a throttle

also known as a throttle potentiometer

moves up and down

All of WTBÆs new mountain tires feature TriTec Compound

low rolling resistance

If no black shroud was used

700x23 Black/Brown Race D Evo4 Bicycle Tire Razor E-Punk also known as a throttleTraditional slick style road racing tire with ProTite belting from bead to bead. The Race D is bred to be the most durable of all the Race line of tires and features bead to bead ProTite belting and a double dipped Duro casing for improved puncture resistance. All Panaracer Race series tires feature Zero Slip Grip advanced rubber compound for improved road traction. Panaracer: RF723 RCD D4