Quote:
Originally Posted by vash
step 1. see what tires are on that Excursion. big trucks like that use E-rated (?) right? the 10-ply tires needed for big towing and heavy loads.
if thats what is on the truck, i bet changing to a lighter tire would greatly improve the bumps.
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This is true but you need at least D-rated tires to support the weight of the vehicle+passengers, so it's a slightly different version of the same tires. E-load tires can hold 65 lbs. of air and Ds are 45-50, IIRC so just airing down the 10-plys to 45 lbs. should accomplish the same thing. It sounds like he's tried that already.