The Maxxis Aspen ST is an ultra-low-profile race tyre developed primarily for short-track XC racing, sometimes referred to within the Aspen range as the "Fastpen". It's built to give racers an edge in dry, hard-packed conditions where outright speed is the priority over outright grip. MaxxSpeed Compound Silica-filled rubber formulation, updated from the previous-generation 3C MaxxSpeed compound Maxxis states it reduces rolling resistance and improves wet-weather traction compared with the old 3C MaxxSpeed formula EXO Puncture Protection Cut- and abrasion-resistant reinforcement added to the sidewalls, using a densely woven, lightweight and flexible fabric Adds sidewall protection on rocky, abrasive trails without a meaningful weight or performance penalty Tubeless Ready Folding bead, tubeless-ready construction runs without an inner tube when paired with a tubeless-compatible rim, tape and valve Supports lower air pressures for improved traction and lower rolling resistance than an equivalent tube-type tyre, with less chance of flatting Use tubeless-ready, tubeless road or tubular sealant only Maxxis states sealant used in any other tyre type will void the warranty Specification Detail Size 32 x 2.15in Discipline Cross-country (XC) / Gravel Terrain Dry XC conditions Compound MaxxSpeed Casing EXO Puncture Protection TPI 120 Bead Type Folding Tubeless Tubeless Ready Max Pressure 50 PSI Weight 685g (single tyre) Colour Black Sold as a single tyre. The Aspen ST trims weight and profile from the standard Aspen for riders who want the fastest tyre in the range for dry-condition XC racing.