Spinner NXT Smart Release Commercial Spin Bike Manufactured by Star Trac with Four Spinning DVDs by Mad Dogg The Spinner NXT SR, manufactured by Star Trac, delivers all the style, function, features, and adjustability as the top selling Spinner NXT but includes the Smart Release flywheel safety system for smooth performance and added safety Top quality components and improved Q-factor; dual-sided SPD compatible pedals and dual water bottle holders integrated with the handlebars Micro-adjustable handlebar and seat settings provide vertical and fore/aft user adjustment for optimal bike fit The Smart Release system gives riders a unique fixed gear feeling with an added level of safety, unique to Spinner bikes The Spinner NXT SR comes with 4 FREE Spinning DVDs to help you reach your fitness goals at home; DVDs include Ultimate Energy, Train and Tone, Turn and Burn and Maximum Results