Ride Japan - Rear Crank Party

Ride Japan - Rear Crank Party, The sleeve is called Rear Crank Party due to the interior nub design of the sleeve resembling capsule balls. (Crank is the motion of twisting the lever to get a capsule) This design makes the tunnel have a very wavy looking design. The ball/capsule nubs throughout the tunnel differs between nub, parallel ribs, and perpendicular ribs designs. This design creates a very pointed stimulation as you move through these balls.