Tire question

[matrix563]

So I finally got them all lined up for a pic. The damn big one tipped over on the way for the photo lol. Totally crushed half of a pottery vase I didn't mean to get crushed. Oh well.



I know the weight of the big one because I weighed it on the dump scale before i left, it was 600 pounds.

How can I be sure of the weight of the 2 that appear similarly sized?

According to the websites, the one next to the big one is 445. The next one is 287.

The only problem is the 445 one is 12 ply and the other is 16 ply. So 16 ply is 287 and 12 ply is 445. Something doesn't seem right. Both say 20.5-25.

16 ply: http://icmtires.com/index.php?pid=pr...uid=338&cid=15
12 ply: http://grandamericantires.com/MyProd...ckSearch:EL-2A
(all of the el-2a's are 20.5-25 and listed as 445)

All I can think of is this i found:
The 8 PR mean 8 ply rated. It may have only 6 actually plys of cord in the construction that are larger than standard cord or mybe just stronger.

So the 16 pr means less than 16 plys, even if it means 16 ply strength. the 12 ply one is actual 12 plys.

The smaller tractor tire is 190 pounds. I believe it, I can lift it off the ground.
http://www.titanstore.com/info/486861



How did I get 2 of them home?

[irongrandpa]

I found the weight of the one I got by looking up the tires' specs online. It sounds like you've already done that. I found the brand, size, and plys to learn mine weighs 430#.

[matrix563]

i just find it weird for 2 tires that are 20.5-25, one is 16 ply and 287 and the other is 12 ply and 445. seems weird to me. the 16 ply one is slightly taller than the 12 ply, but doesn't look as dense. so maybe thats how. but i'm not sure. i need a scale!

[irongrandpa]

The tire chart I found mine on the 12ply weighed less than the 16ply. My 12ply was 430# and I think the 16ply was about 30# more.

[KBKB]

You can weigh them by using three bathroom scales.

Roll the tire out into the street and tip it over, so that it's flat on the ground. Pick up a section of tire at roughly equidistant points around the circumference and slide a bathroom scale underneath. Once you've finished, the tire should not be touching the ground at any point. If it is, place a shim (perhaps a short length of 2x4) between the tire and the surface of the scale. The weight of the tire will be the sum of the readings from the three scales. (Subtract out the weight of the shims if you want, but it will be a small percent of that of the tire and will probably be within the margin of error anyway.)

You can come up with a good estimate using a single scale. Do as mentioned above, but slide a scale under a portion of the tire and slide a shim of the same height of the scale (plus any height altering shim that's on the scale itself) underneath the tire at the other two points. Slide the scale underneath the tire at the other point. Record the reading of the scale. Remove the scale and replace it with a shim. Move the scale to one of the remaining to locations where there is a shim and replace the scale with the shim, recording that reading. Do the same thing for the remaining position. A reasonable estimate of the tire's weight will the sum of the three readings. As above, it is critical that the tire not be touching the ground at any point. The accuracy will be better if your shims are close in height to that of the tire. The size of the shim at each location should offer as much support as the scale itself does.

[matrix563]

awesome idea thanks kbkb

You must spread some Reputation around before giving it to KBKB again.