CRANK SPINDLE BIKE STANDCompatible with 13, 18 or 20mm hollow crank spindles System fits road bike, cyclocross bike, mountain bike, and electric bike crank designs Elevates the rear wheel and stabilizes the bike Construction prevents contact with painted surfaces or delicate components Folds to a compact unit when not in use Powder coated steel maintains a long term clean finish Bike parking solution for even the heaviest of bikes (50 lb. 22. 7kg max load)