I do not have this model, either, but usually like Becky says, there is an ability to adjust the side to side (where the wheel rests on the back) where your quick release (axle of wheel) attaches to the trainer. You dial it in until the wheel sits in the middle and then lock it down. You might want to look up the maker of the trainer on the web and they may have instructions, or at least a contact person you can call to find out how that trainer works.