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Old 01-16-2010, 01:45 AM
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GregInAtl GregInAtl is offline
Dodge Ram Forum Senior Member!
 
Join Date: Aug 2009
Location: Loganville GA
Age: 42
Posts: 618
Gender: Male
Vehicle: 2012 Ram 1500 QC
Trim Level: Express
Color: Dk cherry red
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 6
Rep:130
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google tire size calculator, there are several good ones. Put in your current tire size, and then chose 24" and it'll spit out a close match. If you dont want a lower profile tire, why 24"....Was your OEM size 275/60-20? If so a plus 4 would be a 285/40-24

Stock Tire - 275/60R20
Tire 1 - 285/40R24

Section Width: 10.82 in 275 mm
Section Width: 11.22 in 285 mm

Rim Diameter: 20 in 508 mm
Rim Diameter: 24 in 609.6 mm

Overall Diameter: 32.99 in 837.94 mm
Overall Diameter: 32.97 in 837.43 mm

Sidewall Height: 6.49 in 164.84 mm
Sidewall Height: 4.48 in 113.79 mm

Radius: 16.49 in 418.84 mm
Radius: 16.48 in 418.59 mm

Circumference: 103.6 in 2631.4 mm
Circumference: 103.5 in 2628.9 mm

Revs per Mile: 630.4
Revs per Mile: 630.8

Actual Speed: 60 mph 100 km/h
Speedometer1: 60.0 mph 100. km/h
Speedometer Difference: - Speedometer Difference: 0.063% too fast
Diameter Difference: - Diameter Difference: 0.07%
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