Just bought a 90 F350 EC DRW.. (76K). The truck came with 7 different tires on it. ???

All LT215/85R 16...

LF - Goodyear Wrangler - relatively new, good pattern,
RF- Commerical Truck Tire - Decent tread and pattern

L Inner R - ??? Bald, like a slick
R Inner R - ??? Bald, like a slick
(Both heading for rubber muncher)

L Outer R - Goodyear - fair tread but has cracking on the sidewall
R Outer R - Firestone - Good, but has some wear... (could be a Spare)

Spare - Michelin - Steel popping thru Tread...
(Also heading for rubber muncher) I will probably use the Firestone - R Outer R as the spare.

Looking at buying 4 new tires, 1 pair for the Front. I am not sure where to put the 2nd new pair on the Inside or Outside rear?

Any thoughts, suggestions? - Also I looked at Discount Tires where I have been buying my car tires for years... What brand is the best tire for lowest cost.? Why are LT 215/85R16 more expensive than 235/85R16?

Thanks for the input... (Repost from SuperDuty/HeavyDuty)

 

you should just get all new tires so they are the same size and you don't have to worry about it mis match tires are never any good

 

Thanks for the feed back... OK... I can see the logic... even though my wallet puckers a bit... So now I guess I am looking at "7" new tires...

Any feedback on what brand to go with would be ver much appreciated - i.e. Michelin, BFGoodrich, Goodyear, Dunlop,etc.

BTW - My Axle code is D5 -- any info on that would be much appreciated...

 

to save some money you could use the best tire you have in the bunch as a spare. also you might look in to Dayton tires, they have all kinds of truck tires for a good price, goodyear is also a good brand but gets to be kinda pricey. the others are also good tires, it just depends on what you are wanting to do with it.

 

So I currently have LT215/85/16's... Do I have to stay with that size? Can I use 235/85/16's or something else? Most of my driving will be with light or no load, but I do plan on Towing a 5er or TT within the next year or so. Any ideas?

Thanks...

 

My boss has been running Michelins on his dually in that size for a while and keeps throwing down the $1100 for six of them every year. He gets about 60-70K out of them under severe use each year.

Put the newest tires on the steer axle, then the second newest pair on the rear axle inners.