The ExtraTerrestrial is an ultra-durable touring tire designed to provide low rolling resistance and durability on various multi-road surfaces, and the low-profile, directional tread pattern maintains traction when it&&';;s needed. Molded tread pattern for anti-cut propagation Kevlar cap under the tread to protect against flats Nylon breaker in the sidewalls for cut protection Recommended rim width: 23 - 30mm