The Maxxis Aspen ST Mountain 29 120 TPI Maxxspeed/Exo/Tr tire featured here at Escapa is a competition tire designed to offer minimal rolling resistance on dry, compact, and fast tracks. The ST (Short Track) version takes the Aspen concept a step further with a center tread pattern featuring small diamond-shaped knobs, designed to promote speed without completely sacrificing traction.
Its MaxxSpeed compound, flexible 120 TPI casing, and Tubeless Ready construction make this a tire geared toward XC riders who prioritize acceleration and efficiency. The more pronounced side knobs maintain traction when the bike leans into corners.
Ultra-Fast Short Track Design
The center tread replaces the Aspen’s conventional knobs with a surface of small, diamond-shaped protrusions. This configuration reduces tread deformation and promotes exceptionally fast rolling on hard, compact terrain.
The side knobs retain a more aggressive shape to provide support in corners. This contrast between a minimalist center section and more pronounced shoulders aims to balance speed and control on fast Cross Country courses.
MaxxSpeed Compound
The MaxxSpeed compound uses a high-silica formulation developed specifically for XC racing. According to Maxxis, it reduces rolling resistance by approximately 25% compared to the previous 3C MaxxSpeed compound, while maintaining good responsiveness on wet surfaces.
This reduction makes it easier to maintain speed and improves efficiency during accelerations, on compact trails, and during intense pedaling sections.
Flexible 120 TPI Casing
The 120 TPI casing uses a high thread density to provide a lightweight and flexible structure. This construction allows the tire to better adapt to small irregularities in the Terreno and helps reduce rolling resistance.
The casing’s increased flexibility also improves contact with the surface when the tire pressure is properly adjusted for weight and Terreno.
Tubeless Ready
The Maxxis Aspen ST features a Tubeless Ready construction, allowing it to be installed tubeless on a compatible rim using tape, a valve, and sealant. The Tubeless system allows for lower tire pressure to improve traction and comfort, while also reducing the risk of pinch flats. The sealant can also automatically seal small punctures while riding.
