E rated tires
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E rated tires
Anyone else using 65psi load range e tires on their truck to pull a 5th wheel instead of the 80 psi? I ask because i forgot to look when i got new tires the other day and now this is what im stuck with. Any issues with blowing out or shifting belts? Im still within the weight limit but now only by 700lbs instead of 1500lbs. The tires i got are mickey thomson deegen 38. They are 35x12.50r20
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Maybe I've not been around long enough (I'm only 65 after all), but I've not encountered load range E tires that weren't max rated for 80 PSI on the sidewall. If they exist, as senix said, they may not be as stiff as you would like. A lot of trucks (like my DRW F350) have load range E tires rated at 80 PSI but the door sticker calls for 65 PSI all around. The vehicle and tire engineers set those numbers based on the weight and load capacities.
Rob
Rob
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From: Media PA
Maybe I've not been around long enough (I'm only 65 after all), but I've not encountered load range E tires that weren't max rated for 80 PSI on the sidewall. If they exist, as senix said, they may not be as stiff as you would like. A lot of trucks (like my DRW F350) have load range E tires rated at 80 PSI but the door sticker calls for 65 PSI all around. The vehicle and tire engineers set those numbers based on the weight and load capacities.
Rob
Rob
Rob, it's the oversized tires that get the lower max pressures. Bigger footprint/contact patch requires less pressure to bear the same(-ish) load. My Nitto Dura 305/70R18s (35"X12.5") are a max 65 PSI Load Range E tire but they have a higher load rating than the 265/75R16s they replaced that were 80 PSI max pressure E tires. My experience with these and towing a very heavy TT that gives me up to a 6600lb rear axle weight is that they are every bit as solid feeling (if not more due to the highway rib design) as the smaller stock tires were in the same service, no squishy feel or squirminess, just an excellent performing tire.
Token Redneck
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From: Breckenridge, TX
Rob, it's the oversized tires that get the lower max pressures. Bigger footprint/contact patch requires less pressure to bear the same(-ish) load. My Nitto Dura 305/70R18s (35"X12.5") are a max 65 PSI Load Range E tire but they have a higher load rating than the 265/75R16s they replaced that were 80 PSI max pressure E tires.
Ply Rating of D and E isn't what really matters, it's all about the load index in terms of actual capacity. Ply rating will be a valid comparison between otherwise similar tires of the same size/load index, but if you're talking different sizes or AT vs MT, load index is more informative.
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drydocked
Brakes, Steering, Suspension, Tires, & Wheels
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Sep 13, 2004 12:36 AM
