These are getting used more than anything else in our facility."The M3iX is a newer addition to Keisers dynamic line of award winning indoor fitness cycles.Combining the unique pivoting patented X-Bars to the heralded M3i Indoor Cycle makes the M3iX to mountain biking or hill climbing what the M3i is to road biking.It has the same silky smooth ride and M3i reliability, with 7 levels of handlebar resistance. Independent upper and lower body movements offer great core, upper torso, and arm benefits and also aids balance training.Research shows X-bars burn more calories than traditional group exercise bikes. The X-Bars offer added variety for both instructors and riders both in the classroom setting and out on the fitness floor.FEATURES X-Bars, providing seven levels of resistance Compatible with Polar heart rate monitors Bluetooth Wireless Technolog Automatic backlit digital display V-shape frame and handlebar combo to accommodate all riders Rust-resistant design includes stainless steel