47 Ultimate control. Center Link POWER TRAC (750/740/730). With the same mobility as previous models, the center link POWER TRAC gives your LEXION greater traction from the hydrostatic drive on the rear axle. POWER TRAC can be engaged while moving, and the adjustable rear axle reduces fuel consumption due to greater efficiencies. Additionally, the system completely declutches during road transport to save even more fuel. Larger rear tires. Bigger rear tires mean a larger contact area with the ground, and a reduced tire track depth. For rear tire options, please refer to the chart on page 63.