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[oletrucks] tire size

To: OLETRUCKS@autox.team.net
Subject: [oletrucks] tire size
From: MLayton324@aol.com
Date: Wed, 2 Feb 2000 16:06:55 EST
RPM = V / D x GR x 334.2
Where:
V = vehicle speed in mph
D = effective tire diameter
GR = gear ratio (e.g., for my truck, 4.10 rear x .70 overdrive = 2.87)

the above formula on the chevy truck sit does not seem to work out   what am 
i doing wrong

55 mph/ 27 inch tire is 2.03    2.03 x 4.10(gear ratio) x 334.2 equals 2781 
which is supposed to be rpms at 55

if i was only turning 2800 at 55 i would be estatic    i cant even get it to 
55 without feeling like its gonna blow       help??


thanks    mike layton
50 3100    
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959

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