The Ultimate TRUE TIRE SIZE Database

TrailHunter said:
I talked with a BFG rep yesterday and they said the 37x12.5x17 KM3 would be released in October. It will be offered in a 6 ply (C) and an 8 ply (D). I tried to get weight/height specs but no luck.

I think someone installed 35’s recently... was hoping they would post it up here as well.
Click to expand...

I thought they were already out? Was looking at the 39s


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Nitto Mud Grappler

Size stated on side of tire- 37x13.50R17
Actual tire size- 35 7/8

About 4K on them
 

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Bfg km3

I would also really like to know true sizes of the BFG KM3.
Considering the 35x12.5x18

If anyone has any information I would greatly appreciate it!
 
Dustinhill74 said:
I would also really like to know true sizes of the BFG KM3.
Considering the 35x12.5x18

If anyone has any information I would greatly appreciate it!
Click to expand...

Not sure why you feel it to be important but more than likely, it'll have a true measurement of about 33".
 
Yokohama Geolander M/T

285/75R/17

Claim 34"s , on a 9" wheel they come out to 32 &7/8 ". This is with 35 lbs. pressure, just mounted at Discount Tire.
 

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ultimate tire size post.

Hummm, although this is a great thread, i take some exception to the measuring methods. i went out and measured my new jl 2019 jeep tires(I'm new, haven't figured out how to post photos yet). i used a square clamp and measured like a caliper in the center of the wheel while hanging on the wheel rack(no weight). the tire is 245/75/r17 printed on the side wall. this metric equals 31.5". the tire measured 31.47". then i did as the post instructions requested, and went to the ground up measurement. it was 30.9375. the .5" difference is the "belly" of the tire sinking in a bit. all tires do the same thing. at 30 psi the tires still have the belly sag. the second issue is how we look from the tape measure to the tire thread, and at what angle. if a 12" level was laid across the tires, and measured would be more accurate. by analyzing the data posted, there is a direct correlation by the tire sizes small to large by the difference of the stated size vs actual size. as 1 example an BFG MUD_TERRAIN T/A KM3 lt295/70/r17 states the overall diameter at 33.3" at proper pressure. the company states the max psi is 80 psi. if this tire is deflated to 30 psi im not surprised to see a 1.5" to 2" smaller measurement. bfg's "35" is stated to be 34.6". i think this is closer to correct than 33" reported here. also consider a tire rolling/spinning at 624 revs per mile, at 70 mph, is probably larger in diameter.

the question i'm trying to answer, is what is the maximum size tire i can install on a stock/no lift 2019 jl sport 2 dr Jeep wrangler? has anyone had first hand experience ?
 
jhm1 said:
Hummm, although this is a great thread, i take some exception to the measuring methods. i went out and measured my new jl 2019 jeep tires(I'm new, haven't figured out how to post photos yet). i used a square clamp and measured like a caliper in the center of the wheel while hanging on the wheel rack(no weight). the tire is 245/75/r17 printed on the side wall. this metric equals 31.5". the tire measured 31.47". then i did as the post instructions requested, and went to the ground up measurement. it was 30.9375. the .5" difference is the "belly" of the tire sinking in a bit. all tires do the same thing. at 30 psi the tires still have the belly sag. the second issue is how we look from the tape measure to the tire thread, and at what angle. if a 12" level was laid across the tires, and measured would be more accurate. by analyzing the data posted, there is a direct correlation by the tire sizes small to large by the difference of the stated size vs actual size. as 1 example an BFG MUD_TERRAIN T/A KM3 lt295/70/r17 states the overall diameter at 33.3" at proper pressure. the company states the max psi is 80 psi. if this tire is deflated to 30 psi im not surprised to see a 1.5" to 2" smaller measurement. bfg's "35" is stated to be 34.6". i think this is closer to correct than 33" reported here. also consider a tire rolling/spinning at 624 revs per mile, at 70 mph, is probably larger in diameter.

the question i'm trying to answer, is what is the maximum size tire i can install on a stock/no lift 2019 jl sport 2 dr Jeep wrangler? has anyone had first hand experience ?
Click to expand...

Are you an engineer? Welcome to WAL? [emoji1309]
 
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jhm1 said:
Hummm, although this is a great thread, i take some exception to the measuring methods. i went out and measured my new jl 2019 jeep tires(I'm new, haven't figured out how to post photos yet). i used a square clamp and measured like a caliper in the center of the wheel while hanging on the wheel rack(no weight). the tire is 245/75/r17 printed on the side wall. this metric equals 31.5". the tire measured 31.47". then i did as the post instructions requested, and went to the ground up measurement. it was 30.9375. the .5" difference is the "belly" of the tire sinking in a bit. all tires do the same thing. at 30 psi the tires still have the belly sag. the second issue is how we look from the tape measure to the tire thread, and at what angle. if a 12" level was laid across the tires, and measured would be more accurate. by analyzing the data posted, there is a direct correlation by the tire sizes small to large by the difference of the stated size vs actual size. as 1 example an BFG MUD_TERRAIN T/A KM3 lt295/70/r17 states the overall diameter at 33.3" at proper pressure. the company states the max psi is 80 psi. if this tire is deflated to 30 psi im not surprised to see a 1.5" to 2" smaller measurement. bfg's "35" is stated to be 34.6". i think this is closer to correct than 33" reported here. also consider a tire rolling/spinning at 624 revs per mile, at 70 mph, is probably larger in diameter.

the question i'm trying to answer, is what is the maximum size tire i can install on a stock/no lift 2019 jl sport 2 dr Jeep wrangler? has anyone had first hand experience ?
Click to expand...

That’s quite the intro to a simple question lol
 
jhm1 said:
Hummm, although this is a great thread, i take some exception to the measuring methods. i went out and measured my new jl 2019 jeep tires(I'm new, haven't figured out how to post photos yet). i used a square clamp and measured like a caliper in the center of the wheel while hanging on the wheel rack(no weight). the tire is 245/75/r17 printed on the side wall. this metric equals 31.5". the tire measured 31.47". then i did as the post instructions requested, and went to the ground up measurement. it was 30.9375. the .5" difference is the "belly" of the tire sinking in a bit. all tires do the same thing. at 30 psi the tires still have the belly sag. the second issue is how we look from the tape measure to the tire thread, and at what angle. if a 12" level was laid across the tires, and measured would be more accurate. by analyzing the data posted, there is a direct correlation by the tire sizes small to large by the difference of the stated size vs actual size. as 1 example an BFG MUD_TERRAIN T/A KM3 lt295/70/r17 states the overall diameter at 33.3" at proper pressure. the company states the max psi is 80 psi. if this tire is deflated to 30 psi im not surprised to see a 1.5" to 2" smaller measurement. bfg's "35" is stated to be 34.6". i think this is closer to correct than 33" reported here. also consider a tire rolling/spinning at 624 revs per mile, at 70 mph, is probably larger in diameter.

the question i'm trying to answer, is what is the maximum size tire i can install on a stock/no lift 2019 jl sport 2 dr Jeep wrangler? has anyone had first hand experience ?
Click to expand...

The Stock tires on my JK are 31”.

IMG_0008.jpg

Welcome to Wayalife. [emoji481]
 
jhm1 said:
Hummm, although this is a great thread, i take some exception to the measuring methods. i went out and measured my new jl 2019 jeep tires(I'm new, haven't figured out how to post photos yet). i used a square clamp and measured like a caliper in the center of the wheel while hanging on the wheel rack(no weight). the tire is 245/75/r17 printed on the side wall. this metric equals 31.5". the tire measured 31.47". then i did as the post instructions requested, and went to the ground up measurement. it was 30.9375. the .5" difference is the "belly" of the tire sinking in a bit. all tires do the same thing. at 30 psi the tires still have the belly sag. the second issue is how we look from the tape measure to the tire thread, and at what angle. if a 12" level was laid across the tires, and measured would be more accurate. by analyzing the data posted, there is a direct correlation by the tire sizes small to large by the difference of the stated size vs actual size. as 1 example an BFG MUD_TERRAIN T/A KM3 lt295/70/r17 states the overall diameter at 33.3" at proper pressure. the company states the max psi is 80 psi. if this tire is deflated to 30 psi im not surprised to see a 1.5" to 2" smaller measurement. bfg's "35" is stated to be 34.6". i think this is closer to correct than 33" reported here. also consider a tire rolling/spinning at 624 revs per mile, at 70 mph, is probably larger in diameter.

the question i'm trying to answer, is what is the maximum size tire i can install on a stock/no lift 2019 jl sport 2 dr Jeep wrangler? has anyone had first hand experience ?
Click to expand...

Read the original post. The idea is to measure tires at the same pressure, while mounted to the Jeep, and on the ground. Unless you are building a tire swing, who cares what it measures hanging from a rope? It’s a tire. It’s supposed to be on the ground.


Sent from my iPhone using WAYALIFE mobile app
 
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