M 1900 SPLINE® For reliable freedom in the mountains. After a long climb, a perfect trail unfolds beneath your tyres: flowing, dusty, varied and seemingly endless. With the M 1900 SPLINE, nothing stands between you and a full dose of All Mountain thrills. Designed to strike the optimal balance between weight and durability, this rim delivers efficient climbing characteristics as well as excellent impact resistance on tight, narrow trails. Thanks to the new Ratchet LN system and hand-building by experienced technicians, this wheel is the dependable partner for your mountain descents and free-rolling rides.