Our all new design includes a 52 tooth, 69mm wide front pulley and 69 tooth rear pulley both 69mm wide and driven with our specially designed 142 tooth belt which rounds off the perfect combination. Other features include a specially designed ring gear for easy starting and of course our Ball Bearing lock up clutch that provides positive engagement with minimal clutch pull. 2-3/4″ drive fits 2007-Up Softail and 2006-Up for Dyna applications, except SE, CVO, breakout and rocker models.