The Demon heavy duty axles are equipped with TPEE (Thermoplastic polyester elastomer) boots which are stronger; stiffer; fatigue resistant; puncture resistant; and temperature resistant than a standard OEM boot. At Demon Powersports; we design and test all our Heavy Duty Axle to have 1.5 inches of plunge travel and 40° articulation over terrain on the inboard joint. While the outboard joint can travel 0.5inches and swing from 45°-47° depending on the model. Axles use molybdenum grease to provide low friction and smooth motion. Trust in Demon Heavy Duty Axles to keep you riding! These axles also utilize a unique double plunge design which allows it to achieve higher articulation angles approximately; the axles are designed to plunge in and out allowing for 1.5 inches of travel and 40° articulation over terrain on the inboard joint. Please review all product information to ensure that this product is compatible with your unit. This item comes with 1 year warranty.