New AccelaVelo Roller Pro-X-Trainer Indoor Bike Trainer PRECISE: Fiber reinforced composite frame designed to not lose shape and precision over time like metal frames. SMOOTH: 3-1/2" wide dynamically balanced rollers with sealed roller ball bearings. Durable elastomer belt for quiet and consistent drive. ADJUSTABLE: 10 increments of adjustability for the front wheel and back wheel. Designed to accomodate wheelbases from 37" up to 44-1/4" (112.4cm). COMPACT: Double hinged design allows trainer to fold flat. Only 26-1/4" x 19" x 8-1/4" folded, and 55" total length unfolded. GREAT WARRANTY: 5 year warranty included at no extra cost serviceable directly through us. Made in Taiwan a leader in high quality bicycle gear and equipment (better quality than China made roller trainers).