Hey all,

I got a set of Bridgestone Dueler a/t's from a buddy. They arent NEW but are in great shape. I figured it would save me the cost of NEW right now since my tires are lookin bad haha. Anyways I have the BFG Rugged Trails, 275/65/18s, they are load index 114 ("2601 @ 44psi"), psi they are used at is 35psi.

The tires I got from him are the Bridgestones, a 265/65/18, so just slightly narrower/smaller sidewall. Anyways they are a Load Index 112 (2469 @ 44psi). The guy at the store told me he can't mount them because their load rating is not high enough for my truck. Seems odd to me because they came off a 4wd 4 door tahoe which has to be at least close to the weight of my truck (although doesn't carry the kind of weight you could put in the bed of a truck, if that matters).

I have been googling all over, but can't seem to figure out what the minimum load index I can run at a proper PSI (like my current tires @ 35psi). I only paid $60 for these tires (all of them) so it seemed like a win at the time...right now I dunno haha. I dont want to risk running them if they are NOT capable to do what the OE tire is supposed to. I realize they appear lower, I jsut didnt know if there was a minimum, or if the original tires 114 WAS the minimum...i dont know "it all" bout tires, so maybe the load index isnt even the bigger issue here.

Thanks. 2007 F150 crew cab, 5.5' bed, 4wd.

 

I'm running a different size tire on my truck than the placard on the door. Right now I'm running General Grabber AT2 at size 265/65/R17.

And to make it even better, the tires that I bought the truck brand spanking new had different size tires (235/75R17) than on the placard. I even made money 2 years after I noticed this. Even the dealer was concerned, mostly because I guess 235/75 is a very obscure size.

My advice: Find a different shop.

Or better yet, take the rims off the truck, and just go with friend to a shop and just drop off the tires and rims, and tell them to mount and balance them.

In fact, I'm running 16" rims and narrow tires on my Jeep for winter tires, in which the placard states 17" or 18" rims with lo-pros. Yes, it does handle much different, but I know the limits of when it will tip over. Just gotta not drive like a speed demon on twisties. I've never gotten bothered by anyone on the fact that I'm running this.

In any case, when you sign the work order, you release yourself from probable risk of something occurring. At least they do that around here.

All I know is that I've never been turned down for having different sized tires mounted for a vehicle. I've been told that it is "not recommended", but I say "I fully know and understand the risks", and they just do it.

 

Ha, shoot. Mine had those same tires on the truck when I took delivery. Didn't even think to look at the doorjamb, as I had the dealer swap them with 265/70/17's.

 

Well, its not the SIZE of the tire, its the load capacity of the tire. That is why he wouldn't mount them. And these tires do appear to be a lower load tire (not by much) then my current tires...I wasn't sure how much of a concern that is.

 

Every tire is going to have a +/- load variation. Even the stock tire size but a different brand and grade will have a slightly different load rating.

Just find another shop.

Those tires will work fine.

Good luck.

 

So tell them that the load rating on the "new" tires at 44 psi is probably higher than the "old" tires at 35 psi, so mount the damn things and put 44 psi in them to cover their @$$.