The Maxxis Aspen ST Tubeless Ready 29-inch tyre (nicknamed "Fastpen") is the ultimate XC and Short Track semi-slick MTB tyre for riders seeking pure speed on dry, fast-rolling terrain.
Engineered to deliver exceptional efficiency and break speed records, it combines an ultra-low-profile tread pattern along the center with slightly raised shoulder knobs to maintain cornering traction without ever slowing you down.
Featuring the latest silica-enriched MaxxSpeed compound, this tyre reduces rolling resistance by 25% compared to previous 3C generations. Combined with cut-resistant EXO Protection sidewalls and a high-performance casing (120 TPI), it is the ultimate weapon for shaving off vital seconds in Cross-Country racing.
Key features
MAXIMUM ROLLING SPEED: Ultra-low "Fastpen" profile designed specifically for ultimate efficiency in Short Track and dry XC racing.
NEW MAXXSPEED COMPOUND: High-silica compound reducing rolling resistance by 25% while improving wet weather grip.
EXO SIDEWALL PROTECTION: Dense, flexible fabric protecting sidewalls against cuts and abrasion without adding unnecessary weight.
WIDE TRAIL DESIGN (2.40 WT): Optimized to fit modern XC rims with a 30 mm internal width perfectly.
Technical specifications
Size: - 29x2.25 - 29x2.40 (WT - Wide Trail XC)
ETRTO: - 57-622 - 61-622
Bead: Folding
Compound: MaxxSpeed (High-silica race compound)
Casing: 120 TPI with EXO protection (Standard race version)
Max pressure: 50 PSI
Tread pattern: Ultra-low semi-slick center tread with raised blocky shoulder knobs
Technologies: - MaxxSpeed (Silica compound reducing rolling resistance by 25% while offering excellent cornering grip) - EXO Protection (Reinforced sidewalls) - Tubeless Ready (TR) (Allows tubeless setup with sealant on tubeless-compatible rims) - Wide Trail XC (WT) (Optimised profile compatible with 25 to 30 mm internal rim widths)
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