DT Swiss D 1900 Classic Rear Wheel - 26" 10 x 135mm Bolt-On 6-Bolt 12T Single-Speed Ratchet LN 36 BLKDT Swiss D 1900 Classic Rear Wheel 26" 10 x 135mm Bolt On 6 Bolt 12T Single Speed Ratchet LN 36 Black. The D 1900 Classic wheel will allow riders to turn it all the way up. Youve dreamed of landing a new trick in the park youve talked about that triple on the pump track but youre still not sure you can pull it off. With the new D 1900 Dirt Jump wheels you can transform your energy into commitment push harder pull higher! This wheel isnt afraid of your