I have recently picked me up a 2002 Ram 1500 quad cab with the 5.9L. It has the factory 20" wheels. My question deals with tires. I do not want to lift this truck at all since it will see 99.9% road time but I do want a decent all terrain tire. I am really intereseted in the nitto terra grappler. If I understand correctly, the 305/50R20 is going to be my best bet. Is this tire size going to fit with any major rubbing issues? Any tire suggestions are greatly appreciated. Thanks ahead.

 

I believe that 35" tire is the biggest you can go with no lift. and the bf goodrich all terrains are a nice tire from what i know. have fun with the new truck. good luck

 

would anybody no where to find a conversion chart for tires sizes. I would like to know how the metric sizes compare to standard sizes.

 

Congrats on the new truck. Do a google search or something for the conversion chart, I have seen it before but don't remember what site it was on.

 

35" tires will not fit unless you level out the front end. You have to stick with a 33" or smaller with no mods. You'd be looking at a 305/55/20

 

well that is a good thing to know. Would there be a quick way to find out how a decent all terrain tire in that particular size would look on a bone stock truck? Pics would be great, but any first hand opinions would be great.

 

305/70/17 Mickey Thompsons look great on any truck as do some good BFGoodrich

 

Congrats on the nw Truck!
Is this what you wre looking for?

http://www.dakota-truck.net/TIRECALC/tirecalc.html

 

right now the truck has 275/60R20 on it. It measures out to be right at 33" tall. I do believe if I crank the torsion bars up 1-1/2 inches a 35" tire will go nicely up under the truck. Another concern that I have is fuel mileage. Will my truck take a significant hit in fuel mileage with the bigger tires?

 

Possible that the tires will effect your mpg. Usually, the bigger, more aggressive A/T's will have a higher "rolling-resistence", knocking your mileage down.Then again, slightly taller tires will lower the rpm for a given speed but at a slight loss of power. I doubt you'll notice it much with that engine anyway. I'd stick to the stock size or the 305/55, but with those wider tires, standby for the water and crud to get sprayed down the side of your truck constantly.