tire size speed correction
03-07-2015, 04:42 PM
#1
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tire size speed correction
my stock tires are 275/65/18. gps showes i am going 60 mph and speedometer is reading 62. so to correct speedometer i need a 275/70/18 to correct?
Specification Sidewall Radius Diameter Circumference Revolutions Speedometer Odometer Difference
275/65-18 7.0" 16.0" 32.1" 100.8" 629/mi 60MPH 10000mi N/A
275/70-18 7.6" 16.6" 33.2" 104.2" 608/mi 58MPH 9673mi 3.4%
Specification Sidewall Radius Diameter Circumference Revolutions Speedometer Odometer Difference
275/65-18 7.0" 16.0" 32.1" 100.8" 629/mi 60MPH 10000mi N/A
275/70-18 7.6" 16.6" 33.2" 104.2" 608/mi 58MPH 9673mi 3.4%
03-07-2015, 04:43 PM
#2
I Like Tires
my stock tires are 275/65/18. gps showes i am going 60 mph and speedometer is reading 62. so to correct speedometer i need a 275/70/18 to correct? Specification Sidewall Radius Diameter Circumference Revolutions Speedometer Odometer Difference 275/65-18 7.0" 16.0" 32.1" 100.8" 629/mi 60MPH 10000mi N/A 275/70-18 7.6" 16.6" 33.2" 104.2" 608/mi 58MPH 9673mi 3.4%
I wouldn't change tire size just to correct that unless you already planned on bigger tires.
03-17-2015, 12:26 AM
#4
I think you will be good with the 275/70R18. I just put them on mine and GPS is saying I am going 71.4 when my speedo shows 70. Not bad enough to recalibrate. Mine showed just about exact before the tire swap.