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12-24-2008, 12:38 PM
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#1 |
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daily driver
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nitrogen is a waste of money unless you track the car heavily
and cars have different rolling diameters and circumferences based on tire size. 205-55-15's are 205mm wide, the sidewall is 55% of the width (112.75mm) and the 15 is the wheel size. 195-55-15's are 195mm wide and the sidewall height is 55% of the width (107.25mm, in this case). 185-60-15's are 185mm wide, the width of the tire is 60% of the width (111mm) and the wheel is again a constant. you want to land within 3% of your OEM rolling size to keep the speedo as accurate as possible... 1010tires.com had a great tire size calculator.... http://www.1010tires.com/TireSizeCalculator.asp
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12-26-2008, 06:44 PM
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#2 |
 
Drives: yaris sedan 2NZ-FE Join Date: May 2007
Location: Egypt
Posts: 75
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ok ok , the site is great but there is one thing i dont understand
is the 205 more better than the 195 for me ? isnt that much more rolling resistance even if it has 0.5 % less error of speedometer thanx alllll |
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