Aspen EXO/TR 120 TPI Tubeless 29´´ x 2.25 MTB Tyre.Size:29´´ / 2.25.High-volume casing, low-profile tread Race inspired low profile design Aggressive side knobs Lightweight XC race tire Dual Compound Maxxis has done it again with its latest XC race tire.The new Maxxis Aspen pushes the limits of a lightweight XC tire designed to have minimal rolling resistance.The Aspen is designed with a high-volume casing to smooth out the roughest roots and rocks, while the dual compounds give optimal traction in the corners.So if crossing the finish line first is your top priority, then the Aspen was designed for you.