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Old July 11th, 2011, 07:37 AM   #1
cobra96svt570
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Default Gear Ratio/Tire/Rpm - Graph-chart.

Here is a Tire size to Gear ratio = RPM chart/graph. If I remeber its for Ideal econommy-Avereage driving RPM, graph Ive had. Great for guys who drive there rigs as a dailly driver, and woods warrior. figured Id post it. Maybe it can help someone out there.
http://www.greatlakes4x4.com/picture...ictureid=11251

I beileive ]Yellow = best hi-way/on road economy,top end, some off-road.
Green= best all around, avg economy/stock feeling, On road & Off road.
Blue = good all around, lower economy, better off-road, low end.some on-road.


Last edited by cobra96svt570; July 11th, 2011 at 02:25 PM.
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Old July 11th, 2011, 09:08 AM   #2
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Note that these are calculated at a 1:1 ratio and at 65MPH.
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Old July 11th, 2011, 09:55 AM   #3
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anyone have a chart of 1 to 1 at 70?
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Old July 11th, 2011, 10:12 AM   #4
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Quote:
Originally Posted by wadey View Post
anyone have a chart of 1 to 1 at 70?
multiply those results by 1.08 to get rpm at 70
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Old July 11th, 2011, 10:21 AM   #5
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sweet graph. nice info to have. thanks!
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Old July 11th, 2011, 12:35 PM   #6
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Quote:
Originally Posted by Kodiak450r View Post
multiply those results by 1.08 to get rpm at 70
Works out pretty close.

If you want to figure it out, the formula is:


RPM = (MPH * Gear Ratio * 336) / Tire Diameter
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Old July 11th, 2011, 02:21 PM   #7
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Quote:
Originally Posted by Jeeperz Creeperz View Post
Note that these are calculated at a 1:1 ratio and at 65MPH.
Even though I thought it was 60mph,I was 5mph off.
Thats what I forgot to post. So thanks for posting that up.

Last edited by cobra96svt570; July 11th, 2011 at 02:26 PM.
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Old August 18th, 2011, 11:32 PM   #8
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Thanks !!
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Old August 19th, 2011, 04:05 PM   #9
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try this one, you can plug in your trans, transfer case, & gear ratio.

http://www.florida4x4.com/tech/gearcalc.php
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Old August 19th, 2011, 04:18 PM   #10
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I use this chart all the time while talking about rigs with my friends. It really puts things in perspective.
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