otrfun wrote:
If you're doing a lot of heavy towing/hauling may want to consider a set of 295/70/18's (vs. 275/70/18). The 295's will net you an extra 800-850 lbs. of tire capacity per axle (vs. the 275's). We installed a set of 295/70/18 Michelin Defender LTX M/S's on our '16 Ram 3500 SRW 4x4. No clearance issues, but our speedo does read about 2 mph slower. Have 15k on them hauling an almost 4k in-bed camper---very pleased with how they ride and wear.
I did this also and I’m running the Cooper AT3 XLT 295/70/R18. They are stiffer than the Firestone’s oems and 1 inch taller. Almost 10,000 miles very nice plus 60,000 mile warranty.
Also my speedo was not affected very much. Tracking w waze and watching the speedometer it is maybe .5 mph. So going 65 steady they both read the same but accelerating it would hit on waze slightly before the truck Speedo. And they are exactly 1 inch taller.