Durablue X-33 Axle is a truely innovative axle design. The X-33 uses the same superior materail and heat treating as the Eliminator. The unique diffrence is in the design. Standard design ATV axles neck down to about 1" in diameter. A splind wheel hub slides onto the axle and is retained with a hex nut. As all ATVers know, hubs loosen frequently. The X-33 changes all that. The wheel hub is clamped solid and drivin by a pin on a 1-3/8" diameter shaft. This axle is rifled to reduce weight near the rotaional axis of the ATV. The "straight bar" X-33 axle has no narrow or weak areas.