[Mudchief]

Just got back from my trip to Iowa and back pulling a load heavier than my 3400RL. I could see no difference in my truck. I am running about 3 miles per hour faster than the speedo shows. I don't care about computing the miles per gallon because I have no control over it other than my foot. With the factory tires I was pushing the max rating but with the larger tire I have a good buffer.