Rim/Tire Size ?'s.....
So I need to know answers from all the tire/rim size people on here & maybe I will get the answers I'm looking for:
I'm currently running 99-00 si wheels with 205/50r15's & need to know if 205/40r16's are basically the same circumference in size? Or will it be really close because I'm planning on trading my si's for some 16" gt3's tomorrow!
LMK ASAP PLEASE!
my tire sidewall measurement formula
ex. 205/40/16
first number is the width of the tire in millimeters
second number is a percentage 40% of 205 is the size in millimeters your sidewall measures
third number is the wheel size
40% of 205 is 88mm and is about 3.2 inches
16 + 3.2 + 3.2 = 22.5 inches
ex2. 205/50/15
50% of 205 is 102.5 which calculates to 4 inches
15 + 4 + 4 = 23 inches
The answer: ^^^^^
Last edited by Humphrizzle; 12-26-2010 at 09:47 PM.
Originally Posted by MR.EM1
205/50-15 4.0in 11.5in 23.1in 72.5in 874 0.0%
205/40-16 3.2in 11.2in 22.5in 70.5in 898 -2.7%
This is what I found out!
Does this tell me that they are a tad bit smaller than my current setup?
Last edited by a94civicex; 12-25-2010 at 07:54 PM.
read my fucking post!!!
Lol, it doesn't matter anymore now, my 205/40r16's are a whole lot smaller than my old 205/50r15's setup!
Thanks for your input & hostility, lol
Used the calculator from 1010tires.com 205/40-16 is in red
Stock Tire - 205/50R15 Tire 1 - 205/40R16
Section Width: 8.07 in 205 mm
Section Width: 8.07 in 205 mm
Rim Diameter: 15 in 381 mm
Rim Diameter: 16 in 406.4 mm
Rim Width Range: 5.5 - 7.5 in
Rim Width Range: 7 - 8 in
Overall Diameter: 23.07 in 585.97 mm
Overall Diameter: 22.45 in 570.23 mm
Sidewall Height: 4.03 in 102.36 mm
Sidewall Height: 3.22 in 81.788 mm
Radius: 11.53 in 292.86 mm
Radius: 11.22 in 284.98 mm
Circumference: 72.47 in 1840.7 mm
Circumference: 70.52 in 1791.2 mm
Revs per Mile: 901.6
Revs per Mile: 926.5
Actual Speed: 60 mph 100 km/h
Speedometer1: 61.6 mph 102. km/h
Speedometer Difference: - Speedometer Difference: 2.761% too fast
Diameter Difference: - Diameter Difference: 2.69%
HOLY FUCK! you dont realize my post contained the answer?
NO KIDDING, it was too confusing so I found it myself!
I can read. However, my post also shows the MPH difference between the two so that he knows what to expect.
Lol math is too hard I guessssss
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