I'm not sure about the "Load Index" or speed index, but I found these tires for the rear..buy one and you get 2 tires..I need all new tires (6 total) but the rears are different size from front..but wondering if these will work on my 85' dually f250 for the rears.

LT 215 85 16 (2) NANKANG SUPER TRIPPER 2 H/T TIRES NEW:eBay Motors (item 300370343474 end time Dec-23-09 11:33:09 PST)

 

I think it all depends on if they will let you buy one tire in the front in one size and get the other (back) two in another size. Check into it and see what they will do for you. Im not an ebay fan but it never hurts to ask.

 

Huh?

I'm asking if those tires are the right load index for my truck.

Going by Wal Marts load index chart..I don't know if this is TOTAL weight or the weight of what you have loaded on the bed.

Load indexes — A number that corresponds to the weight that the tire can accommodate. Some examples are: 74 — 827 pounds, 81 — 1019 pounds, 95 - 1521 pounds, 105 — 2039 pounds, 113 — 2535 pounds, 120 — 3086 pounds, 124 — 3527 pounds, 129 — 4079 pounds, 133 — 4541 pounds, 137 — 5071 pounds, 140 — 5512 pounds, 143 — 6008 pounds, 146 — 6614 pounds, 149 — 7165 pounds

The tire on eBay is rated 110/107..which according to that chart is a little over 2,000lbs. My truck itself weighs more than that.

 

what ply? that plays a big part if your hauling hevy louds...

 

What's that?

I don't plan on using my truck to carry very heavy loads..but I do carry stuff sometimes.

 

it should say c is 6 ply,d is 8 ply and e is 10 ply . not sure on how good thous tires are tho.

 

It says the tire is Load Range D--8 PLY Rated

What does that mean? The lug count? The thing I was worried about was the Load Index

 

The ply refers to the side wall rating. The thicker the side walls the stiffer the ride and the more the tires are rated for. I would shy away form 10 ply unless you need them.

 

Okay so 8ply is good..how about the load index on the tire?

 

I see what your saying now. You should have said thats what you wanted to know. 8 ply is a D range load tire. It is good for hauling and can accommodate a heavier load at a higher speed. Of course if you don't haul heavy you may want a C load range tire. If you get a load range E the tire becomes stiffer and is made for hauling the heaviest of loads.

The load index for the tire is the weight that the tire will hold. Just a rough example not exactly sure if the numbers are right. Say your tire is rated for a 3000lb load index. Well 3000 x 4 (tires) = 12000lbs total load. So if your truck weighs 6000lbs and your load weighs 5000lbs your tires will hold up the load efficiently without being overloaded. Im sure there is more mathematics based on the weight of the load and the load index of the tires but thats the basic idea.