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we were running the stock 235/85/16, E load range tires, my left front had a vertical "dimple" in it from the edge of the rim to the edge of the tread, about the size width and depth of my pointy finger.been there since we got the tires, never any previous problem. while backing into our garage, there was a "BANG-HSSSSSSS", upon getting out of the truck to investigate, the entire tread seperated and blew out the inner sidewall. no cuts, havent hit any monster potholes or roadplates...what the heck happened ? we run em at the 90psi max as its a tow truck and constantly loaded...but it was a front that blew out, not a rear. gotta get new tires now, getting quotes of $200.00 per tire and up . dammit, i can NOT afford to replace them right now....oh well at least it happened in our garage and not the freeway with another $400.00 tow bill on top of the replacement tire costs...gonna do all 4, if 1 bad the others may not be far behind. fark,fark,FARK !
Last edited by Chippenwhales; Feb 13, 2012 at 06:00 PM.
Reason: wrong title...
If that price includes install then it's about right. Cheapest I've been able to find new is about $140 ea, but that's just the tire.
Too bad Ford had to go and switch the bolt pattern because take-offs from newer Super Duty P/Us can be had for much less, including the rims.
Mike
As long as the tire size is the same (or at least the rim diameter), buy the take offs, swap the tires over, and sell the empty super duty rims.. duh...
Chippenwhales, sucks to hear that. I had a tread separate on me last fall on the highway. Luckily the tire didn't blow, but it was scary enough!
Did it blow out where that dimple was? Might have been a manufacturing defect.
ok, after doing night after night after night of web research, i have determined that my 235/85/16 bfg commercial t/a's are NOT rated for the diesel motor--i found a recommended usage chart that shows them being available on all f150/250/350, but only listed up to the 5.8 gas motor. i think i overloaded them with that big old honking diesel ! (it was in fact a front tire that blew out. ) the sidewall also states , " 6 ply-10 ply rating"...ok, guess i need a REAL 10 ply, not a 6 ply "rated" to 10 ply status.dang it ! that means even more $$$$ !!!!!
i don't think the newer trucks still use 16" rims, so takeoffs from there won't work unless you find the right size rim in the older bolt pattern.
as for the tires you have left, i would inspect them and only replace them if needed. plenty of times i've had a tire blow but those that were matched with it lasted much longer.
but about their ratings, every tire has its weight ratings posted on its sidewall, and a load range E should be rated for 3050 lbs at 80PSI. if its not rated at/near that, its a different load range. consider how much weight we put on the rear axle (same model of tires), and they aren't known for blowing up until they exceed their weight ratings or recommended service life. how i understand it, old bias tires had to use a 10 ply construction to get a 10 ply rating, but radial tires almost always have a lesser construction with that rating
i know for a fact that the f-trucks changed to the metric pattern a number of years ago, so i just assumed the vans did too, but thanks for the info john
I assume they are 6 ply poly and 4 steel making it a 10ply that is normal. E rated tires are the heaviest you can buy without going a 19.5 wheel and let me assure you E rated is more than enough to haul half a dozen idi's in the back let alone just one in the front. Dimples in the sidewall are fine and occur quite often bulges are the problematic ones. Sounds like the tire seperated. Warranty should at least pro rate the tire if not free replacement. 90lbs is WAY too much for a front. Tire is only rated for 80. Run 50-65 in the front less in the rear unless you haul often. I run 35 front 28 rear but I also have larger tires. Lower pressure makes it ride a lot nicer and last longer. Only need to max it when you're hauling the max the tire is rated for.
hairyboxnoogle, your pressures sound reasonable for an empty f150, but a bit too low for an e/f350, do you know what these things weigh? in my van i tip the scales at 8000 minimum, and it sounds like the OP is in a tow truck where he's frequently running heavy loads. i agree that 90 up front is more than necessary, and IMO he should stop by the truck scales sometime and see what his front end really weighs, then adjust his tires accordingly, but i wouldn't go less than 60 for anything
Pressure is too high. Just read the door jam and go by what ford says to set it at. I can't see a reason for the fronts being over 50. That what my 4x4 f250 is speced for and it has the 4600lb front end. Even if your loaded most of your weight should be on the back and 80 is what the factory recommends.
You can get tires that are rated at different speed and load ranges. The tire manufacturer sets the air pressure not Ford so ignore the door and read the tire. Tire pressure can vary between manufactures even in the same load range.
You can get tires that are rated at different speed and load ranges. The tire manufacturer sets the air pressure not Ford so ignore the door and read the tire. Tire pressure can vary between manufactures even in the same load range.
The tire manufacturers normally publish a specification sheet that gives the recommended pressure based on the actual load. Goodyear recommends that an LT235/85*16 run 35 PSI for a 1700# load, 50 PSI for a @ 2205#, 65 PSI for a 2623#, 80 PSI for a 3042#. They show a load range G good for 3750# @ 110 PSI. The load rating is based on the internal pressure a tire can take before it blows off the rim. I think a 4 ply rating requires an explosion point of 225 PSI. This is static, no load in a cage.
marianna, you mentioned they show a load range G tire, where can i find them? i just checked tires.com and all they show are load range E in our size, and i checked goodyear's website, and they don't even mention load ratings.
to be honest, i'd be a little surprised to find them, as most of our rims are rated at 3050lbs and 90PSI.
i would expect to find them in 19.5s