GR 1600 SPLINE® Leave the tarmac behind and enjoy the freedom of riding off-road. Leave the tarmac 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 a quick ride off the beaten track, you'll appreciate the agility that comes from the combination of its components. The premium alloy of its welded rim, available in 650b or 700c, offers an ideal blend of lightness and strength. On top of that, its 350 hub and ratchet system let you ride with more confidence on the trail, thanks to quicker engagement than its predecessor.