The Maxxis Overdrive Excel is designed to save time and money on trekking rides. Created to meet the demands of the European trekking market, the Overdrive has a grooved slick design for all-weather applications, as well as SilkShield Puncture Protection to provide excellent protection from encounters with road debris. Dual compound for reliability and grip Grooved slick design for all-weather grip Puncture-resistant thanks to SilkShield bead-to-bead protection Reflective tyre for added visibility and safety Designed for road and some off-road use SilkShield SilkShield offers protection from bead to bead whereas Silkworm is found under the tread only. SilkShield provides an additional level of protection for sidewalls as well as under the tread.