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| About: Bolt-On Wheel Spinners Bolt-on spinner tops use a single center stud mount and may be used wherever there's a bolt hole (wire wheel, hub cap, etc.). Mounting towers for bolt-on spinners have a flange for the lug nuts. The tower is then held in place by the wheel. |
About: Screw-On Wheel Spinners Screw-on spinner tops use 3" ID threads and attach by literally screwing on (like a peanut butter jar lid). Mounting towers for screw-on spinners are actually adaptor rings. The rings attach to the inside of the wheel center hole (~2½" or ~3¼") with set screws. |
