1. Uni wheel rim.
2. Shock absorption: preventing the rebound no matter in rugged, bumpy, or rough roads and making your riding comfortable.
1. Size: 26"x1.5"~2.35" (559x18), 24"x1.5"~2.35" (507x18), 24"x1" (540x16), 24"x1 3/8" (540x16). 2. Material: aluminum magnesium alloy. 3. Assembly: bearing. 4. Front: m9x100x108 w/q.r. a. Rear: m10x130x140 6sp freewheel w/q.r. b. M10x135x145 7sp freewheel w/q.r. c. M10x135x145 8sp freewheel w/q.r. 5. Color: powder coating red, yellow, blue, black, white / CNC.