16" Rear. Fits '03-'07 FLST, FLSTN, FLSTC, '03-'06 FLSTF (except FLSTFSE2) and '03-'05 FXST, FXSTB and FXSTS models. The polished rim and textured disc are divided by a ring of slots that open the wheel for a flash of light. Requires separate purchase of model-specfic Wheel Installation Kit, Sprocket hardware and brake rotor-specific hardware. See I-sheet for details.