The skewer that comes with a Conquer Cycling Trainer is intended to switch with the quick release skewer on the rear wheel of your bike (this is for your safety, and to make your bike compatible with the trainer). This skewer is for indoor use only. 

This skewer is a standard 9mm skewer, and it is 7.5" long at its longest. If your bike's skewer is any longer than this, or if your bike has more than 10 gears on the rear cassette, this skewer (and the trainer) may not work for you.