GR 1600 SPLINE® Leave the pavement behind and enjoy the freedom of off-road cycling. Leave the pavement behind and experience the thrill of off-road cycling with the GR 1600 SPLINE. Whether you’re venturing into the world of bikepacking or simply want to enjoy a quick ride off the beaten path, you’ll appreciate the agility provided by its component combination. The high-end alloy of its welded rim, available in 650b or 700c, offers an ideal blend of lightness and strength. Plus, its 350 hub and ratchet system let you ride with greater confidence on the trail, thanks to faster engagement than its predecessor.