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With 3.92 what RPM with 17" or 20" factory tires @ 65mph

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Old Mar 20, 2011 | 10:43 PM
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markgpz
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Originally Posted by candy08
Ouch! Just tryin to help you bud, to my defense it was confusing. Anyhow here's what you need. Ill even through in the OGR.
Find overall gear ratio- (3.92 gears is 2.6264)
OVER DRIVE GEAR x REAR GEAR = OVERALL GEAR RATIO (OGR)

FIND YOUR RPMS at ANY SPEED-
SPEED x OGR x 336 / TIRE HIGHT = RPMs

You can figure it out yourself now
Sorry, I didn't mean to come off as a smart a$$. Because of an earlier reply I googled and found a web site that gave me the rpm info I posted for...but THANK YOU for the key strokes to solve this on a calculator. It works too!!
 
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Old Mar 21, 2011 | 04:01 PM
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I'm at just about 2,000 rpm at 70 mph. I gave 2010 TRX4x4 with 275 70 17s and 3:92 gears. All stock, no drive train or wheel/tire mods.
 
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Old Mar 22, 2011 | 02:11 PM
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1650 rpm at 60 mph and 20" wheels MDS off, 1700 rpm with MDS on
 
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Old Mar 22, 2011 | 05:36 PM
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70gs, how did you disable MDS, with tow/haul
 
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