11.5″ wide. Foam. Where the name ‘300 series’ might not get your heart racing, the seat itself is a striking and innovative combination between the good lower back support of a touring seat and the unmistakable slenderness of a chopper seat. Made to complement the lines of your bike and give you a good ride, a rare combo in the world of rigid seats. Note: Compatible with rigid frames only. Note: For the style matching optional passenger seat see 507668.