This product may not support a folding bicycle and electric assist bicycle, please do not use it. Because specific frame and parts may be attached. This product may not support a bicycle having a mudguard or stand attached to its rear wheel, because the bicycle cannot be raised vertically. This product may not support pist bikes with no ratchet wheel backstop mechanism attached to the rear wheel. Some of mountain bikes may not be compatible with the product because of their sizes. It is compatible with small bicycles with wheels more than 20 inch. Tire width cannot use the bicycle of more than 60mm. This product may not support a bicycle more than 16 kg in weight. ABOUT "crank stopper mechanism" The most common way to keep a bike vertical has been to hang the front wheel. With this way, the weight of bike itself concentrates on a rim. However our "crank stopper mechanism" solved this problem. Because we keep your bike vertical with the crank, not with the front wheel. You can set in and take out the bike smoothly by utilizing the characteristic of the crank which does not turn in the order direction unless a rear wheel turns. Even the bike with deep rims or carbon wheels can be suported by our system. Crank Stopper Stand CS-650 Size: H=1,285~1,535mm W=500mm D= 600mm Packing: L=820mm W=250mm H=130mm Colors: Black, White, Red. Weight: 6.5kg. Made in Taiwan Please download the English manual from our website　"cycleloker.net/en"