Continental Trail King ProTection 29" Mountain Tire ProTection technology features UST bead and an additional layer of rubber-coated, high strength nylon that extends bead to bead for added durability and air tightness Apex sidewall technology for added stiffness and strength BlackChili tread compound provides reduced rolling resistance and added grip Multitude of small knobs guarantees optimal traction on challenging terrain 3/180 TPI casing