Whether you're a track trainer, regular jogger or some where in between, the Ironman was designed to go as rapidly and far as the running experience takes you. The fixed front wheel, 16" high pressure, low profile tires roll effortlessly on hard surfaces whether jogging leisurely or at training pace speeds. For baby, it's really a smooth ride that has a state-of-the-art suspension setup, ultra-padded reclining seat and adjustable five-point padded harness. The Accessory Adapter feature quickly secures a BOB Infant Car Seat Adapter or Snack Tray. The Ironman's easy-fold, lightweight frame packs up quick so you will never be late for your race. From training sessions to regular jogging, the BOB Ironman was designed to go fast and far. The Bob Ironman is also available in a Dual two-seat model.