[starquestbd22]

If you are looking for it on your tire I don't think it's on there. You can find that info on the tire manufacturer's website.

According to their sites the Wildpeak is safe for 8-11" wheels. Strangely enough I couldn't find anything about the Rocky Mtn on their site but I would think it would be the same. The Grabber is listed as safe for 8-10" wheels. I wouldn't have thought you could put a 315 on an 8" rim but I guess the big sidewall lets it pull in enough to fit. It's gonna have the stuffed, marshmellow look.....nothing wrong with that, just that some folks like it and some don't.

 

[starquestbd22]

Are your stockers 245/75 or 265/75? Going from 245/75 to 315/75 will make your speedometer read 13.59% too slow. At 60MPH it will read about 53MPH. Going from 265/75 to 315/75 will make it read 9.35% too slow. At 60MPH it will read about 55MPH. I'm not certain but I assume the odometer takes it's information from the same system....if so, your truck will start to rack up miles on the odo at the corresponding slowed rate. Not necessarily a bad thing...just something to keep in mind. Also, a 315/75 is basically a 35x12.50. Will that tire fit on your truck? I have no idea about the pre-2002 models.