CHALLENGE Smart Tubeless SealantHigh performance tubeless systems deserve exceptional sealant. Challenge Smart Tubeless Sealant was designed to work with both traditional and handmade TLR tires. This non allergenic, ammonia free formula can seal up to 6mm cuts, remains liquid in the tire for up to 6 months, doesn't coagulate with Co2 use and won't damage rims or tires.

but an interior coating makes sewing an inner tube inside the tire unnecessary

perfect for keeping your keys organized with a touch of originality

intermediate gravel

A tubeless tubular is glued to the rim just like a regular tubular and from the outside there is no way to detect a difference

BEST GRAVEL TIRES REVIEW: Recommended by Road

Thijs and Thibau Nys both won the 2018 Belgian Championships one week after receiving the first samples of this tire

Criterium RS is available in our TE (Team Edition) 350tpi Corespun Cotton casing for improved weight and compliance

This keychain is a true symbol of sustainability

260TPI Super Polyester casing with our durable SmartPlus Compound tread and a Latex Inner Tube with 48mm valve stem

and powering up inclines with ease

fast courses

The Strada is Challenge’s go-to champion for efficiency and sublime road feel