XM 1700 SPLINE® High-End Aluminum All-Mountain Wheel: optimized for versatile use. The best aluminum All-Mountain wheels in the world. Period. That’s why we designed the XM 1700 SPLINE. It’s up to you to see if it’s true. In any case, you’ll have everything you need to become the king of the mountain: lightweight yet sturdy welded rims, perfect tubeless compatibility for maximum grip and puncture resistance, and our ultra-reliable RATCHET freehub bodies with a 36-tooth ratchet ring. With the XM 1700 SPLINE, your All-Mountain adventures will know no limits.