Tire Weight vs. Tire Size? - Jeep Wrangler Forum
Jeep Wrangler Forum

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

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 01-25-2012, 10:07 PM
Thread Starter
MudRunner's Avatar
Join Date: Nov 2011
Posts: 823
Tire Weight vs. Tire Size?

I have narrowed my tire choices down to two different tires, the Goodyear Duratrac and the Toyo M/T; however, I was wondering which has a larger effect on your drivetrain, the relative size or the weight? For example, take a 33" Toyo at around 70 lbs, and a 35" Duratrac at around 60 lbs (hypothetically), which would have a greater effect on the drivetrain? Sorry for the noob question .


2011 JKU: 3.73's + Trac-Lok Diff + AEV DualSport XT 2.5" + 295/70R17 Toyo M/Ts on Addicts + JKS Quick Disconnects + OR-Fab Tire Carrier w/ Rotopax + Rusty's Offroad Trail Standard Rear + Rugged Ridge Rock Sliders + Poison Spyder Brawler Lite + Engo EPF1000S + Rigid 10" E-Series + Spiderwebshade + Cobra 29LX CB Radio + 2' Firestik II
MudRunner is offline   Quote
Old 01-25-2012, 10:19 PM   #2
Join Date: Jan 2012
Posts: 84
The heavier tire, regardless of size, has a greater effect on unsprung weight. That will affect braking, shocks, and to some extent fuel economy.

The larger tire will affect final gear ratio, and that will show as poor MPG and a lack of power.

I recently change from a D rated BFG KM2 to an E rated Nitto Trail Grappler on my Power Wagon. Both are 35/12.5-17 tires, but the Nitto is slightly shorter, an inch wider, and 18 lbs heavier. I needed the higher capacity of the E rated tire, but now pay a 6% penalty in MPG, and I can feel the weight in the brakes.

Whenever the new Orange Crush Rubicon is delivered we're going up from the stock 255/75-17 Rubicon BFG to a 255/80-17 E rated BFG KM2, and I fully expect to lose a similar amount of MPG.

CactusRed is offline   Quote
Old 01-25-2012, 10:28 PM   #3
Join Date: Jan 2011
Location: Eastern Iowa
Posts: 1,086
I'm not sure which has the biggest affect. I used to run the 82lb 35 inch Toyos and they ate my ball joints in 6k miles on my '10 Rubicon. They also chunked terribly, some of the center lugs were about ready to fall off as they cracked at the base nearly all the way through. They sure looked good though. I'm trying KM2s this time, at 7k miles on my '12 Rubicon they look perfect and are around 15lbs per tire lighter. I have read that the total rotating mass being 60 lbs more with the Toyos is the same as having ten times that much weight (600lbs) in the Jeep.

The Toyos were E rated and I could go down to 8psi off road. The KM2s are D rated and appear completely flat at that psi. I run 16 in them off road.
Silverton34 is offline   Quote
Sponsored Links
Old 01-26-2012, 11:06 AM   #4
pkmcd99's Avatar
Join Date: Jan 2012
Posts: 2,117
When talking about reducing rolling wheel weight, you have to seriously consider rim material and size. Some cases a large tire small steel rim for example can weight more then say a larger aluminum rim and tire equalling same height, say maybe a 18" wheel with a 315/65r18 kevlar mtr. Just saying.
pkmcd99 is offline   Quote
Old 01-26-2012, 11:19 AM   #5
Imped's Avatar
Join Date: Jan 2011
Location: Indy
Posts: 3,524
The diameter of the tire plays more of a factor on everything than weight. Leverage is the key word here--the brakes have less leverage over a taller tire, the engine has less leverage over a taller tire, and that taller tire has more leverage on the hub bearings, ball joints, and axle shafts. Weight is obviously something you want to limit as much as possible but in terms of a 60 lb 33 vs. a 60 lb 35, the 33 will not require as much exertion to brake and accelerate.
Imped is offline   Quote
Old 01-26-2012, 11:49 AM   #6
pkmcd99's Avatar
Join Date: Jan 2012
Posts: 2,117
What im saying is if you have two equal overall size tire/rim combos, but one is lighter due to larger and lighter rim and lighter tire compound that tire with the lighter mayerials will turn easier then the heavier one and shead pounds in all four corners
pkmcd99 is offline   Quote
Old 01-26-2012, 11:54 AM   #7
Join Date: Apr 2011
Location: Pa
Posts: 9
Can you use the stock wheels with the 255/80/17 tire?
olderthandirt is offline   Quote
Old 01-26-2012, 03:01 PM   #8
pkmcd99's Avatar
Join Date: Jan 2012
Posts: 2,117
Ive never run that size on OEM rims. I believe there similar to a 33x10.50r17 I could be wrong. If they are similar to a 33 then they will most likely have slight rubbing issues because of your rims backspace.

pkmcd99 is offline   Quote

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tire Size anthony20031 JK General Discussion Forum 36 03-09-2012 04:52 PM
increasing tire size on 09 JK damndirtydog JK General Discussion Forum 17 12-19-2011 07:22 PM
Say what?!? 35s on 15s? ESP JK General Discussion Forum 24 11-16-2011 02:31 PM
Actual tire size comparison.... Jollyczar TJ General Discussion Forum 7 09-27-2010 10:51 AM
questions regarding tire size, gear ratio and lift Black_Rocky_Mountain JK General Discussion Forum 3 08-01-2010 04:19 PM

All times are GMT -5. The time now is 08:02 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.