Ergon GE1 Evo Grips - Juicy Orange Dawson Sports the old Presta valve core

the old Presta valve core must be unscrewed with the enclosed tool

This improves tyre adherence

that is liquid when you apply and becomes almost solid when it dries on the chain

providing efficiency on roads and stability on trails

and affordable entry-level shoe

Ergon GE1 Evo Grips - Juicy Orange Dawson Sports the old Presta valve coreThe GE1 Evo is the evolution of the successful Ergon GE1. It was specifically developed for racing in the Enduro World Series. The first ergonomic, rider oriented grip for wide rise bars with more comfort, a more precise grip feeling and better performance. Specifications Use: Enduro, All Mountain Trail, E MTBMaterial: GravityControl RubberClamp: Extruded Aluminum CNC Machined Mfr Claimed Weight 110g