DT Swiss G 1800 Rear Wheel - 650b 12 x 142mm Center-Lock HG 11 BlackDT Swiss G 1800 Rear Wheel 650b 12 x 142mm Center Lock HG 11 Black. The entry into the world of gravel riding the G 1800. If you want to give cycling a try and plan to do your first rides off road the G 1800 is your choice of wheel. Combining all the key advantages of DTs gravel segment wheels at a very attractive price point these wheels may be your entry into the world of gravel riding. Leave for beaten roads and turn to the unexplored paths the G