CYCLEOPS Mag Trainer Made in USA 7" high 21" wide Not compatible with 29'ers Includes Race Day training video Redesigned to deliver even more resistance Quick-lock bike mount lever on all trainer frames Will fit MOST 29er wheels up to 2.25" width, depending on tire tread (Smooth tire recommended) New 5-position adjustment makes it easy to vary your workouts. Redesigned to deliver even more resistance Quick-lock bike mount lever on all trainer frames