[RayChez1]

You have too much air pressure on the rear tires if you have over 100 lbs. It probably rides like if the tires were solid like a rock. I use only 90lbs on the rear and 100lbs in the front.

I just can't figure why you can not pump anymore air into that rear tire, unless you are using a compressor that is not capable of sustaining over 120lbs of air pressure in the tank. You got to have a good compressor to fill up those big tires. Mine are 22.5 265x75 Toyo tires.