Maxxis Aspen ST Tire - 29 x 2.25 Tubeless Folding Black MaxxSpeed EXO 170tpi. The Aspen ST is an ultra-low-profile race tire designed primarily for short track XC use. Sometimes referred to as the “Fastpen” this tire is sure to give any racer an edge in dry conditions.

Aspen ST tires are intended first and foremost for racing in suitable conditions