The Ultimate TRUE TIRE SIZE Database

Mybadjk

Caught the Bug
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.

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


Sent from my iPhone using WAYALIFE mobile app
 

Archangel_Jeep

New member
Nitto Mud Grappler

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

About 4K on them
 

Attachments

  • 4F6F786C-02E0-4845-9E79-D61C41177BE2.jpg
    4F6F786C-02E0-4845-9E79-D61C41177BE2.jpg
    152.2 KB · Views: 449
  • D2238185-C17E-490C-BBA7-F4D769E577CC.jpg
    D2238185-C17E-490C-BBA7-F4D769E577CC.jpg
    85.4 KB · Views: 453

Dustinhill74

New member
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!
 

wayoflife

Administrator
Staff member
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!

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

Tixslam

Active Member
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.
 

Attachments

  • 20190227_162434.jpg
    20190227_162434.jpg
    54 KB · Views: 329

jhm1

New member
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 ?
 

USMC Wrangler

New member
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 ?

Are you an engineer? Welcome to WAL? [emoji1309]
 
Last edited:

Jsouder53

Hooked
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 ?

That’s quite the intro to a simple question lol
 

TrailHunter

Hooked
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 ?

The Stock tires on my JK are 31”.

IMG_0008.jpg

Welcome to Wayalife. [emoji481]
 

notnalc68

That dude from Mississippi
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 ?

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
 
Last edited:
Top Bottom