THE RACE GRAVEL TIRE. The Schwalbe G-One R is made for use on light terrain, 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.