Dangerous tire to run ?

[newdiesel1]

Got new set of 295/70/17 terra grappler today. Tire store told me my rims are probably a 7.5" (thanks to Shadow Grey for confirming they are infact 7.5") anyway was on Nittos web site they state that this tire size is approved for a rim of 8"-9.5". 1. Why would a tire store sell me a unapproved size for my rim? 2. What is the dangers of keeping this tire on my truck? They had ordered me a 305/65/17 BFG A/T wich is for a 8.5"-11" rim but they never got loaded on the delivery truck. I put about 2200 lbs in my bed plus pull my trailor with about 8500 lbs. I have 30 days to bring them back for a upgraded tire if I need to. I like the way these tires look on my 06 f-250 but I do not want to put mine or anyone else's life at risk. What are your guys thoughts? Thanks for having this web forum here for us newb diesel owners. I have learned a lot about diesels in my last 30 days thanks to your discussions.

[Ditty]

Personnally, I would take 'em back and get a tire that is rated for your 7.5" wheel. Your running the risk of popping the bead off the rim.

[newdiesel1]

Thanks Ditty for the ultra quick reply. Thats what I was thinking but thought I would run it by you pros first. Will be at the tire store first thing in the morning. Thanks again.

[DieselWarrior]

No sense in taking a chance...

[Ditty]

Originally Posted by DieselWarrior

No sense in taking a chance...

That's what I was thinking. It's a 50/50 thing. You could drive on those tires until the tread is gone ... OR ... you could be driving to the tire shop in the morning and all four could go on you and put you into a ditch. Better safe than sorry!

[straycat]

You should also try and get a tire that is at least an E rating, They have a stronger sidewall, a little safer for towing and hauling. And with the weight your talking about, you wouldn't want any less.

Gord.

[dukey_78]

I work at a tire shop and we put tires like that all the time. we have never had a problem the suggested rim width is where the tire is at the correct hight. i don't think you would pop a bead off on the wider tire it is the skinny tires that i would worry about but that is my thoughts. But you do wat feels rite.

[newdiesel1]

Thanks guys for the quick replies tire store opens at 8am hopefully they will have the ones I need.

[Logan]

I have run 305/75/16s on my old truck, and never had a problem, I would not think that it would be an issue. But, if you do not feel comfortable, take them back, its your truck and not mine. Good Luck getting it fixed to your liking. Also, House22 is in the same town, you might want to look him up.

[straycat]

The width on the rim wouldn't bother me to much, do that all the time on the offroaders, It's the weight your carrying on them that would bother me. With a tire that much wider than the rim, you are going to get more side to side movement, plus you have to run more air in them because the tire will want to lift in the center. they will end up wearing faster under the load. No load, no problem.

Gord.