Tire guys !!! Different weight ratings on my truck. Could it be the problem?

Question

I went to Firestone bought Bridgestone duelers to replace the duelers I had on the truck also got an alignment. They put 2450lb weight rating max 50psi on the front and 3415lb weight rating 80psi max on the back.
I rotated them myself and brought it back for an alignment and they rotated them back. Ever since these tires (same model as my last tires) were put on, my truck handles like crap and now the front tires are wearing funny. Of course I spoke with the manager who said it's OK because the heavier tires are on the back but then he just looked at me funny when i said "How am I supposed to ratate them,... Dude?( with an attitude ) The Door sticker says 60PSI front and 80psi rear, I can't put 60psi in 50psi max tires. I really use to like this truck but lately because of the way it handles I don't like driving it anymore. Is it me or are they trying to pull a fast one. I never even heard of putting two different weight ratings on the same car especially when you're paying 1000.00 for new tires. I also have a lifetime alignment agreement and believe me I use it. What to do???

Naughtums · Accepted Answer

The Tire Information Tag inside the drivers door has the correct tire size (including Load Index) and inflation pressure. I'm fairly certain that information is going to be the same for both the front and rear axle (year/make/model would have been helpful).

For example, if the truck is supposed to have a tire sized LT265/75R16 123/120R Load Range E (the 123/120 is the Load Index) and they put a couple of LT265/75R16 112/109S Load Range C tires on there that is a serious safety issue.  As you pointed out the recommended inflation pressure for the front axle is 60 psi and a C Load tire only goes to 50 psi.  The difference in load carrying capacity is 320 pound per tire.   

If they put any tire on the car with a lower load index than is specified by the vehicle manufacturer then they have violated Rubber Manufacturer Association guidelines for proper tire replacement.  They have also jeapardized your safety by have two tires of inadequate load capacity.  They are legally liable for any damage you may suffer if a tire should fail since the tires are clearly of lower capability than what is specified by the vehicle manufacturer.  Since they did not follow proper industry guidelines in recommending a replacement they don't have a leg to stand on.  Ask the manager how he would like it having tires on his vehicle that were overloaded to the tune of 640 pounds? 

They need to replace your tires.  

Period.

Derek B · Answer

yeah i believe your gettin screwed. I pull cattle trailers all the time and even then ive never had heavier tires on the back of my truck. I would jus start doin my buisness somewhere else cause they prolly dont know what their talking bout. there jus tellin you that so you will go away so id say screw em.

Howard L · Answer

Just put 30-35 psi in them all around.  The max pressure numbers are not what should be used for driving.

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Tire guys !!! Different weight ratings on my truck. Could it be the problem?

3 Answers