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Old 06-04-2006, 11:33 PM   #1
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Default Just a FYI for people with bigger tires....

Befor with my old wheels and tires at 60MPH on speedo i was gong 60MPH on GPS
(205x75 R15)

Now with my new wheels and tires at 60MPH on speedo im going 63MPH on GPS.
(235x55 R17)


Just so people know and they dont get a speeding ticket when they think there going close to the speed limite.
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Old 06-04-2006, 11:40 PM   #2
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Default Re: Just a FYI for people with bigger tires....

Quote:
Originally Posted by bandit
Befor with my old wheels and tires at 60MPH on speedo i was gong 60MPH on GPS
(205x75 R15)

Now with my new wheels and tires at 60MPH on speedo im going 63MPH on GPS.
(235x55 R17)


Just so people know and they dont get a speeding ticket when they think there going close to the spped limite.
Spped limite? I noticed after we did a car one time, we put 17s on a 14 inch car and it had a significant difference.
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Old 06-05-2006, 08:35 AM   #3
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Gumball had linked me up to a site on difference in MPH for tire sizes...

Where'd I put that link? Jim...got the hook up?
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Old 06-05-2006, 08:40 AM   #4
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If you carefully choose your sizes, you won't have that problem.

http://www.1010tires.com/TireSizeCalculator.asp

There are calculators that will suggest the right rolling diameter out there. We also had this posted in Techinfo for a long time, but the old calculator page died.
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Old 06-05-2006, 09:10 AM   #5
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Quote:
Originally Posted by willwren
If you carefully choose your sizes, you won't have that problem.

http://www.1010tires.com/TireSizeCalculator.asp

There are calculators that will suggest the right rolling diameter out there. We also had this posted in Techinfo for a long time, but the old calculator page died.
yeah but if i went with a size that made it so my speedo didn't change then the ties would be shorter and not look as good. and i wanted a side wall the size i have cuz the roads in NY are really bad.
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Old 06-05-2006, 09:13 AM   #6
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with the stock tires on mine i got 3 under the speed limit on radar by the cops. i think i'm gonna go bigger once i can order brakes at the same time
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Old 06-05-2006, 09:14 AM   #7
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ummm yeah that tire size calulactor i think is wrong, cuz it said that my speedo will only be of 0.2 mph
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Old 06-05-2006, 09:21 AM   #8
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Quote:
Originally Posted by bandit
ummm yeah that tire size calulactor i think is wrong, cuz it said that my speedo will only be of 0.2 mph
At what speed?

My change from 225/60/16 to 235/55/17 was about about 1-2 mph at 60mph.
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Old 06-05-2006, 09:24 AM   #9
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[quote="BillBoost37"]
Quote:
Originally Posted by bandit
ummm yeah that tire size calulactor i think is wrong, cuz it said that my speedo will only be of 0.2 mph
At what speed?

Actual Speed: 60 mph 100 km/h

Speedometer1: 59.8 mph 99.7 km/h
Speedometer Difference: - Speedometer Difference: 0.261% too slow
Diameter Difference: - Diameter Difference: 0.26%

thats what that sights said, its wrong!
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