Notices
Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

PLEASE DO NOT START SHOW & TELL TYPE THREADS IN THIS FORUM

Actual diameter of your 37" tires?

Thread Tools
 
Old 02-05-2010, 08:38 PM
  #1  
JK Enthusiast
Thread Starter
 
FunWagon's Avatar
 
Join Date: Sep 2007
Location: central, NJ
Posts: 312
Likes: 0
Received 1 Like on 1 Post
Default Actual diameter of your 37" tires?

When I run 28 PSI in my 37" KM2 tires they measure 35.5". Is it this low for you guys?
Old 02-05-2010, 08:54 PM
  #2  
JK Jedi Master
 
mkjeep's Avatar
 
Join Date: Aug 2007
Location: Hammond Louisiana
Posts: 15,665
Likes: 0
Received 3 Likes on 3 Posts
Default

Eh, most 37's aren't actually 37's anyway. You can look at their actual size charts and alot are 1/2in shorter. Add weight and lower tire pressure , wahhlah, your 37's are now 35's Makes me feel better about runnin 37's on my d-30
Old 02-06-2010, 05:33 AM
  #3  
JK Enthusiast
 
Join Date: Jan 2007
Location: West "By God" Virginia
Posts: 339
Likes: 0
Received 0 Likes on 0 Posts
Default

My 36" Iroks measure 36.7" factory spec, and measured just under 36" with about 40% tread left.
Old 02-06-2010, 05:39 AM
  #4  
JK Super Freak
 
codysanders's Avatar
 
Join Date: Aug 2009
Location: spencer, indiana
Posts: 1,093
Likes: 0
Received 0 Likes on 0 Posts
Default

it all depends on rim width, weight and air pressure. i have found that most bfg's will run about 1.5" less then stated size once on the vehicel. my 35 km2's messure approximatly 33.5 after mounted up. i wish i would have went 37's now.
Old 02-06-2010, 08:49 AM
  #5  
JK Freak
 
meljr's Avatar
 
Join Date: Jun 2008
Location: Blodgett, OR
Posts: 702
Likes: 0
Received 0 Likes on 0 Posts
Default

GoodYear 37x12.50x17 MT/R Kevlars measured 36" at 30PSI on the ground.

-meljr
Old 02-06-2010, 08:57 AM
  #6  
JK Enthusiast
 
jcole's Avatar
 
Join Date: Jan 2010
Location: Surrey, BC
Posts: 148
Likes: 0
Received 0 Likes on 0 Posts
Default

LoL what a ripoff. Atleast Interco and Pitbull tires are true to measurement or a hair larger on almost all their tires.
Old 02-06-2010, 09:43 AM
  #7  
JK Enthusiast
 
jcole's Avatar
 
Join Date: Jan 2010
Location: Surrey, BC
Posts: 148
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by OlegFl
I think you missed the previous post. My 37" Cooper stt are 37" when not mounted. If I used a 10" rim and ran 50-60 psi I would have it stand at 37" mounted. Since I use a 7.5" rim on a 12.5" tire and run 26 psi... I get 35.80" mounted. I'm pretty sure that if pitbulls stand at 37" unmounted... They would be less then 36" mounted on my setup.
Pitbull Rocker Radials 35x12.5's measure 35.2" @ 28psi mounted on an 8" wide wheel. Same deal with most Intercos. You got ripped buddy, I'd ask for my 1.2" worth of money back on those tires.
Old 02-06-2010, 11:03 AM
  #8  
JK Super Freak
 
davidwm71's Avatar
 
Join Date: Nov 2007
Location: Piscataway,NJ
Posts: 1,117
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by jcole
Pitbull Rocker Radials 35x12.5's measure 35.2" @ 28psi mounted on an 8" wide wheel. Same deal with most Intercos. You got ripped buddy, I'd ask for my 1.2" worth of money back on those tires.
On that 8 inch rim you are squeezing the hell out of that tire. That make the tire stand taller when on tht rim. Put the same tires on the correct rim and you will measure a shorter overall height.
Old 02-06-2010, 11:07 AM
  #9  
JK Super Freak
 
davidwm71's Avatar
 
Join Date: Nov 2007
Location: Piscataway,NJ
Posts: 1,117
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by OlegFl
I think you missed the previous post. My 37" Cooper stt are 37" when not mounted. If I used a 10" rim and ran 50-60 psi I would have it stand at 37" mounted. Since I use a 7.5" rim on a 12.5" tire and run 26 psi... I get 35.80" mounted. I'm pretty sure that if pitbulls stand at 37" unmounted... They would be less then 36" mounted on my setup.
Shouldn't the skinnier rim make the tire stand taller? Also I've always been told don't go more than 4 inch wider than your rim. Any shops I have talked to wont even mount the tire for you.

or is whats happening is you are squeezing so much you lose some side wall height?
Old 02-06-2010, 11:40 AM
  #10  
JK Junkie
 
spinlock's Avatar
 
Join Date: Jul 2009
Location: The San Andreas Fault
Posts: 2,343
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by FunWagon
When I run 28 PSI in my 37" KM2 tires they measure 35.5". Is it this low for you guys?
That sounds about right. The KM2s run slightly on the short side.

MY 35" KM2s @ 30psi are 33.5" tall and that is on the stock 7.5" wide rims.


Quick Reply: Actual diameter of your 37" tires?



All times are GMT -8. The time now is 05:20 AM.