THE RACE GRAVEL TIRE. The Schwalbe G-One R is made for use in light terrain, on gravel roads and asphalt. Thanks to the Super Race carcass, it combines souplesse, speed and control at the highest level. New Boomerang profile for best traction uphill and ideal rolling behavior. Super Race carcass (souplesse construction) for a particularly smooth ride with low rolling resistance and high impact protection. Angled side lugs create in conjunction with the Super Race carcass best cornering grip.