Xterra tr63 treadmill the xterra tr63 treadmill combines quality performance and great looks you desire with the flexibility of a machine that can be easily folded up and stored away specifically designed for the home environment the tr63 incorporates numerous thoughtful features that were developed with your performance and comfort in mind boasting a speed range up to 18km the tr63 is powered by a smooth and quiet 275 hp continuous motor exceptional performance is experienced thro