Bigger tires stock gears = less pulling power. - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 04-30-2011, 04:01 PM Thread Starter
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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.
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post #2 of 4 Old 04-30-2011, 05:17 PM
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4.30

Gear Ratio Calculator

2016 F-350, FX4, CCLB, 6.7PSD, 7" OUO/ICON/FOX lift, 37x13.50-18 Toyo MT
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post #3 of 4 Old 05-02-2011, 09:40 PM
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4.56 gets u back to the stock ratio. Use the gear calc to determine, stock tires are 31.5 with 3.73s

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post #4 of 4 Old 05-02-2011, 09:58 PM
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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...

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