Ideal wheel size for 40x15.5x20? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > General Jeep Discussions > Tires & Wheels

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-23-2015, 06:01 PM
Thread Starter
  #1
Newb
 
Join Date: Oct 2015
Posts: 9
Ideal wheel size for 40x15.5x20?

I was told that my wheel were too narrow for my Toyo Open Country tires.
To be honest, I'm not sure my current wheel size. However, it's narrow enough that Discount Tire was not willing to rotate and balance them for me, because they felt that it was considered a risk for them.

FYI - I purchased this Jeep (2014 Rubicon) pre-owned as my ranch vehicle.

So, if I were to make things right and purchase a better wheel fit for my tires, what would that be?

The current tires are 40x15.5x20 (practically brand new tires). So, I'm inclined to buy new wheels, instead of buying new tires to fit the wheels.

Your input is appreciated!

jnkirk1974 is offline   Quote
Old 11-23-2015, 06:18 PM   #2
IITYWTMWYBMAB

::WF Administrator::
 
4Jeepn's Avatar
 
Join Date: Apr 2005
Location: Florence, KY
Posts: 12,284
So to recap the tires are 40" tall... 15.5" wide and the rim diameter size is 20" is that correct... i would think you would want a 12"-13" wide rim. I would however say that the stock axles are not up to running tires that big though...

__________________
79.96.85.00.01.97.00.97.93.97.95.94.15
CJ.XJ.CJ. TJ. TJ.ZJ. TJ.TJ. ZJ.ZJ.YJ. XJ. JK


JKU Build Inside: Party Girl
WranglerForum: Youtube Channel https://www.youtube.com/channel/UCHO...TLdAuMbTLs_bxw

JKUR 2" Rancho Sport - BlackForest Throwback Top - Milestar 315 Patagona Mt's - Outlaw Sheriff Rims - Bushwacker Flat Fenders -
Spicer Parts F/R Diff Covers, Front Drive Shaft - 4340 Alloy Shafts- Metal Cloak Overland Rock w/Flip Step -JCR Transmission Skid- Quadratec LED Headlights- Q9500i winch
4Jeepn is offline   Quote
Old 11-23-2015, 07:00 PM
Thread Starter
  #3
Newb
 
Join Date: Oct 2015
Posts: 9
Quote:
Originally Posted by 4Jeepn View Post
So to recap the tires are 40" tall... 15.5" wide and the rim diameter size is 20" is that correct... i would think you would want a 12"-13" wide rim. I would however say that the stock axles are not up to running tires that big though...
Thank you for the quick response!

Any recommendations on the axles?
jnkirk1974 is offline   Quote
Sponsored Links
Advertisement
 
Old 11-23-2015, 07:08 PM   #4
Jeeper
 
Jays tj's Avatar
 
Join Date: Dec 2014
Posts: 62
What axles are you running d60 and 14bolt?
Jays tj is offline   Quote
Old 11-23-2015, 07:20 PM
Thread Starter
  #5
Newb
 
Join Date: Oct 2015
Posts: 9
I really wish I knew. I bought this about a month ago. Apparently, the original owner had no idea what he was doing and I, being a complete newb, have had to discover everything wrong with the Jeep.

Fortunately, the engine, transmission, etc are in great shape. However, the lift kit install was completely botched (had the whole thing stripped down and re-installed) and now the wheels are not right for the tires.

So, let's assume that the axles are the stock ones.
jnkirk1974 is offline   Quote
Old 11-23-2015, 08:03 PM   #6
Jeeper
 
Fjpanda's Avatar
 
Join Date: Nov 2014
Location: Peoria, IL
Posts: 200
Start out by posting photos of the axels and the wheels/tires on it currently.
Fjpanda is offline   Quote
Old 11-23-2015, 08:22 PM   #7
Jeeper
 
billiebob's Avatar
 
Join Date: Jun 2014
Location: Kootenays, British Columbia, Canada
Posts: 4,119
this ^^^

you can't get advice which will help if you can't answer the questions.
pictures, like 20 of them will help

But for the opening question...
Go to the Toyo website and read what rim they recommend.
__________________
My Uncles first Jeep was Government issued in 1944..
When all Jeeps were Government issued.
billiebob is offline   Quote
Old 11-23-2015, 08:38 PM
Thread Starter
  #8
Newb
 
Join Date: Oct 2015
Posts: 9
Thank you very much, guys. I will do that tomorrow. Should have done it before asking the question.

As much as it's annoying that I'm having to do all of this, there is a certain satisfaction in knowing that everything is being done right. In the end, this will truly be MY Jeep!
jnkirk1974 is offline   Quote
Old 11-24-2015, 12:13 AM   #9
Jeeper
 
billiebob's Avatar
 
Join Date: Jun 2014
Location: Kootenays, British Columbia, Canada
Posts: 4,119
__________________
My Uncles first Jeep was Government issued in 1944..
When all Jeeps were Government issued.
billiebob is offline   Quote
Old 12-05-2015, 01:06 AM   #10
QUEEN OF MALLCRAWLERS

WF Lifetime Member
WF Supporting Member
::WF Moderator::
 
mommymallcrawler's Avatar
 
Join Date: Sep 2013
Location: Scottsdale, Arizona
Posts: 8,012
Truthfully, you are better served buying new tires in a more reasonable size. Those tires are too large and heavy for a stock D44 Axle. If the prior owner screwed up the lift, I suspect they didn't know enough to regear either - so you are most likely misgeared for that size tire. And did they install hydroassist steering? Basically those tires have made a whole lot of parts of your Jeep a ticking time bomb just waiting for something to implode if the components weren't upgraded.

On stock axles, a 35x12.5 is a much safer bet. Gusset the C's, maybe truss or sleeve the axles if you do a lot of Offroad - much better.

__________________
2014 JKR Granite Crystal, 5.13 Auto: RK X Factor 2.5 Inch Lift, Artec Front and Rear Truss, Artec Rear LCA Mounts/Skids, Poison Spyder HD Crossmember, Rock Hard Gas/TC/Evap/Oil Skids, Rough Country Diff Sliders, Nitto Trail Grapplers 37x12.5x17, Pro Comp 97 Series Wheels, Synergy Weld On Rear Trackbar Bracket, PSC Hydroassist, T6 Aluminum Tie Rod, G2 Gold Chromoly Axle Shaft/RCV front axle shaft, Dynatrac Ball Joints, 1310 driveshafts, Artec Rear Upper CA Mounts, Warn VR8000.
mommymallcrawler is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off






All times are GMT -5. The time now is 03:45 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.