The Mitas XT-454 is a premium Hard-Enduro Tire. Competition Specific “Double Green” sticky compound. Unique combination of stability and grip in rocky conditions with wet or loose mixed terrain. Large knob block provides stability under acceleration & braking. Mitas signature Green stripe competition compound provides maximum grip and resists cuts or tears. Ideal choice for slippery east coast hard Enduro events or rocky, fast & rough west coast extreme Enduro racing. Double green stripes indicate a tire with a softer carcass and extra soft tread compound for rocky terrain and most demanding extreme enduro competitions.