Bigger tires stock gears = less pulling power. - Ford Powerstroke Diesel Forum
Wheels, Tires, and Brakes Here's where you can post all your topics and questions about wheels, tires and brakes.
Sponsored by Discount Tire

LinkBack Thread Tools Display Modes
post #1 of 4 Old 04-30-2011, 03:01 PM Thread Starter
Compression Ignition Addict
emilio's Avatar
Join Date: Jun 2010
Posts: 258
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Feedback Score: 0 reviews
Bigger tires stock gears = less pulling power.

Ok first off I have a f250 CC 4x4 LB. The truck with stock 265x75x16 and 3.73 gears could pull a house. Now the truck has a 6.5 inch lift with MT classic II
20x10 and Procomp muds 37x12.50x20. It still does very well but I recently bought a 25 1/2 foot tt bumper pull. I wanted to get back some of that torque that the bigger tires rob. I thought about down sizing in tires to a
33x12.50x20 but prices for that size are crazy high. So I thought maybe changing gear ratios. What would be a optimal gear ratio for a 37 inch tire. I guess I could use my stock wheels when pulling my tt but the truck looks much better with the wider tires. Just looking for some opinions or knoe how.
emilio is offline  
post #2 of 4 Old 04-30-2011, 04:17 PM
Compression Ignition Addict
Betaracer's Avatar
Join Date: Oct 2006
Location: Out west
Posts: 402
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews

Gear Ratio Calculator

2016 F350 XLT FX4 CCLB. 7" Icon/OUO/Fox, 37" Toyo MT on 18x9s
Betaracer is offline  
post #3 of 4 Old 05-02-2011, 08:40 PM
Compression Ignition Addict
jetjock15's Avatar
Join Date: Jan 2009
Location: Vegas
Posts: 3,663
Thanks: 17
Thanked 154 Times in 136 Posts
Mentioned: 8 Post(s)
Quoted: 110 Post(s)
Feedback Score: 1 reviews
4.56 gets u back to the stock ratio. Use the gear calc to determine, stock tires are 31.5 with 3.73s

King/Deavers/37s/AF 22x12s/4:56/F/R Detroits/Road Armors/Warn12k/155/30s, MTW S1Billet/GoGo Manifold/Banks IC/NADP Heavy Hauler Trans/ORU Hydro-Steer/PHP tow Tune/BPD HD oil cooler/Oil & Coolant bypass/AMP steps/TransferFlow tank-toolbox

jetjock15 is offline  
post #4 of 4 Old 05-02-2011, 08:58 PM Fanatic
Keychain444's Avatar
Join Date: Apr 2011
Location: San Angelo, TX
Posts: 141
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I agree with jet jock 4.56 should get you what your looking for. Also do you have any mods done to the truck or are you running stock with a lift and tires? If you dont have any mods might want to look into exhaust, tuner, etc...

08 F-350 King Ranch, 20" XD Hoss, 33" Cooper Zeon, 5" Turbo Back to 7" tip, WOP Waste Gate, EGR Delete, H&S XRT Pro, S&B Intake..........
Keychain444 is offline  

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome