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<p>wear, save <a href="page.php?w=toll_road">toll road</a> fees, and increase <a href="page.php?w=traction_%28engineering%29">traction</a> on the driven axle.  The 6×6 units have three axles, all can be driven, and 8×6 units have four axles, with either the rear three driven and the front axle not, or the front and rear-most two axles powered and an unpowered lifting center axle to spread the load when needed. The 8×8 units also have four axles, but with all of them driven, and 10×8 units have five axles with the rear four usually driven and</p><p>
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