It’s Maurten’s modular fueling system

Its co-molded construction is super light

such as Token A-box

and are designed with an internal fracture notch which allows the hanger to fracture and bend below the point of damage for the carbon frame to eliminate the risk of frame damage under the hardest of impacts

Also works great on derailleur pulleys

ULTRADYNAMICO Cava Race - Amber - Green / Black Size:700x33 It’s Maurten’s modular fueling systemCatalan Cava is a fine wine indeed. A minimalist tire for those who want the free speed of a high volume slick but need a tire that is more predictable in looser corners. Designed to be used as a pair, or as the rear compliment to a Ros front tire for extra cornering and braking traction. ULTRADYNAMICO's take on a ROAD specific classics race tire thin, light and extremely fast. Designed to be right at home on the little gravel connectors and