Thank you for viewing. This is a self-made skid roller ver. 2, usable for the rear of a Mini 4WD car. The lightweight plastic spacers used in the previous version were becoming difficult to obtain consistently, so I renewed the design, including the shape. As a result, the roller part can be made significantly lower than the previous version, which I believe will expand the range of settings. → See image 2 The rollers use 850 bearings with 520 bearings press-fit inside. The carbon fiber is a plain, aftermarket product. It cannot be used in official races, so please use it for practice runs, etc. Skid rollers adjust the jump attitude by contacting the slope. And, at that time, the rear wheels lift, suppressing the kick-off from the slope, and allowing for a lower jump. Also, even if mounted just above the ground, there is almost no deceleration on the bank due to the rollers. * The price may fluctuate depending on the cost of carbon fiber and rollers. * Please note that returns are not accepted regarding the quality of the product.