This is the Bontrager XR2 Team Issue 650B/27.5 TLR Mountain Bike Tyre. Legendary tire designer, Frank Stacy, provides another race proven tire design for loose over hardpack trails with a lightweight construction, improved cornering traction and impressively low rolling resistance. Cross-country tire for loose over hardpack and/or loamy trail conditions. Fast rolling, with open shoulders for confident cornering. Self-cleaning pattern adds versatility. Proprietary compound gives great traction with light weight. Inner Strength casing (on TLR Team Issue tires) dramatically increases sidewall cut resistance and improves cornering stability. Covered by their Unconditional Bontrager Guarantee.