To Stagger Or Not To Stagger
#31
Driver School Candidate
Join Date: Feb 2011
Location: MA
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i must be reading the tire calc results in the wrong way or something. where exactly is the 1% number you are talking about? im assuming its the diameter difference.
Stock Tire - 225/40R18 Search Tires Tire 1 - 255/35R18
Revs per Mile: 829.3 (225/40)
Revs per Mile: 831.3 (255/35)
Actual Speed: 60 mph 100 km/h
Speedometer1: 60.1 mph 100. km/h
Speedometer Difference: - Speedometer Difference: 0.241% too fast
Diameter Difference: - Diameter Difference: 0.24%
Stock Tire - 225/45R18 Search Tires Tire 1 - 255/40R18 Search Tires
Revs per Mile: 800.9
Revs per Mile: 799.0
Actual Speed: 60 mph 100 km/h
Speedometer1: 59.8 mph 99.7 km/h
Speedometer Difference: - Speedometer Difference: 0.237% too slow
Diameter Difference: - Diameter Difference: 0.24%
so going by these results the number are almost exactly the same, but the 2nd setup actually is slightly closer to equal then the 1st setup. thanks for the help
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#32
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Yes the 1% difference is the different in diameter. It's best to keep it under 1% if possible. Even with 20's, you can get it to .9% which papahoff ran without problems.
I personally just prefer to stay closer to 0.5% or less but there's no need to.
I personally just prefer to stay closer to 0.5% or less but there's no need to.
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#33
Lead Lap
iTrader: (5)
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i must be reading the tire calc results in the wrong way or something. where exactly is the 1% number you are talking about? im assuming its the diameter difference.
Stock Tire - 225/40R18 Search Tires Tire 1 - 255/35R18
Revs per Mile: 829.3 (225/40)
Revs per Mile: 831.3 (255/35)
Actual Speed: 60 mph 100 km/h
Speedometer1: 60.1 mph 100. km/h
Speedometer Difference: - Speedometer Difference: 0.241% too fast
Diameter Difference: - Diameter Difference: 0.24%
Stock Tire - 225/45R18 Search Tires Tire 1 - 255/40R18 Search Tires
Revs per Mile: 800.9
Revs per Mile: 799.0
Actual Speed: 60 mph 100 km/h
Speedometer1: 59.8 mph 99.7 km/h
Speedometer Difference: - Speedometer Difference: 0.237% too slow
Diameter Difference: - Diameter Difference: 0.24%
so going by these results the number are almost exactly the same, but the 2nd setup actually is slightly closer to equal then the 1st setup. thanks for the help![Thumb Up](https://www.clublexus.com/forums/images/smilies/thumbsup.gif)
Stock Tire - 225/40R18 Search Tires Tire 1 - 255/35R18
Revs per Mile: 829.3 (225/40)
Revs per Mile: 831.3 (255/35)
Actual Speed: 60 mph 100 km/h
Speedometer1: 60.1 mph 100. km/h
Speedometer Difference: - Speedometer Difference: 0.241% too fast
Diameter Difference: - Diameter Difference: 0.24%
Stock Tire - 225/45R18 Search Tires Tire 1 - 255/40R18 Search Tires
Revs per Mile: 800.9
Revs per Mile: 799.0
Actual Speed: 60 mph 100 km/h
Speedometer1: 59.8 mph 99.7 km/h
Speedometer Difference: - Speedometer Difference: 0.237% too slow
Diameter Difference: - Diameter Difference: 0.24%
so going by these results the number are almost exactly the same, but the 2nd setup actually is slightly closer to equal then the 1st setup. thanks for the help
![Thumb Up](https://www.clublexus.com/forums/images/smilies/thumbsup.gif)
Stock Tire - 225/45R17 Search Tires Tire 1 - 255/40R18 Search Tires
Section Width: 8.85 in 225 mm
Section Width: 10.03 in 255 mm
Rim Diameter: 17 in 431.8 mm
Rim Diameter: 18 in 457.2 mm
Rim Width Range: 7 - 8.5 in
Rim Width Range: 8.5 - 10 in
Overall Diameter: 24.97 in 634.23 mm
Overall Diameter: 26.03 in 661.16 mm
Sidewall Height: 3.98 in 101.09 mm
Sidewall Height: 4.01 in 101.85 mm
Radius: 12.48 in 316.99 mm
Radius: 13.01 in 330.45 mm
Circumference: 78.44 in 1992.3 mm
Circumference: 81.77 in 2076.9 mm
Revs per Mile: 832.9
Revs per Mile: 799.0
Actual Speed: 60 mph 100 km/h
Speedometer1: 57.5 mph 95.9 km/h
Speedometer Difference: - Speedometer Difference: 4.242% too slow
Diameter Difference: - Diameter Difference: 4.08%
Last edited by laobo979; 03-19-12 at 07:26 PM.
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