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Chris,
You are right and wrong, as are Mike and I. But Mike and I are more correct than you are. While width does effect sideall height, the 2nd number (aspect ratio) effects the sidewall height twice more than the width.
225 x 0.45 = 101.25
215 x 0.45 = 96.75
4.5mm difference
225 x 0.45 = 101.25
225 x 0.40 = 90.00
11.25mm difference
Therefore the common belief and used practice is to increase or decrease the 2nd number (aspect ration) to determine sidewall size.
In addition, it's smarter to change sidewall size.
Why? Because you do not sacrifice width for height. By doing so you get less rim protection on your wheels, increasing the chances of damaging/bending a wheel - especially "curb rash".
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true,but certain tire manufac. make tires that have a small lip that sticks out to help protect the rim..i know that the second number is what makes the biggest difference in sidewall height,i was just saying that a 215/225 45 tire would have different sidewall heights even though the aspect ratio was the same
"Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but STUPID lasts forever."-Aristophanes.
--93 pgt,headers,intake,borla=14.9 1/4mile
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That's true. Also, by reducing the overall tire size, you increase the overall wheel gaps.  225-40/18 is the look Goonz is looking for. See this thread for many pics1. fills the wheel wells perfectly 2. perfect width - both visually and to protect wheels 3. perfect height - no rubberband or 4x4 look
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i agree.but he got 17's...
"Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but STUPID lasts forever."-Aristophanes.
--93 pgt,headers,intake,borla=14.9 1/4mile
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Originally posted by tour96se:
i agree.but he got 17's...
j/k Goonz  
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i am right and thats that. 
Oo (xxx)oO
o xxxxxxxx o
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on a 17 i wouldnt consider a 40series though some guys use 235/40 successfully. so its likely were talking about 45. 215/45 would give a slightly lower profile look on the 17. 225/45 is a great size for a daily driver. dont worry goonz. those pilot sports will wear out soon enough  and u can replace them with 215/45
the only plus is the spokes are black and make it easier to see the spokes and where they meet the lip. i think this'll help them not look as small when u put them on your car.
Hugo AIM:omegazodiac
95 gl & 99 contour svt #1750/2760
my profile pics stuff for sale
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Originally posted by hmouta:
on a 17 i wouldnt consider a 40series though some guys use 235/40 successfully. so its likely were talking about 45. 215/45 would give a slightly lower profile look on the 17. 225/45 is a great size for a daily driver. dont worry goonz. those pilot sports will wear out soon enough and u can replace them with 215/45
the only plus is the spokes are black and make it easier to see the spokes and where they meet the lip. i think this'll help them not look as small when u put them on your car.
actually if the whole rim was black it would "blend" in with the tire..helping it look bigger..thats why my e1's are black...when they were white they looked tiny..which they are
"Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but STUPID lasts forever."-Aristophanes.
--93 pgt,headers,intake,borla=14.9 1/4mile
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Usually deep dish rims/rims with lips look smaller cause of the design of the rim. So You should of gone with an 18inch rim. But they still look good. mount them and you get a different feel.
"Do what you like, Because you have to drive it!"-Me
99 Contour LX
95 Mustang GT Convertible
97 Z24 Cavalier
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Originally posted by Troll Pete:
That's true.
Also, by reducing the overall tire size, you increase the overall wheel gaps.
225-40/18 is the look Goonz is looking for.
See this thread for many pics
1. fills the wheel wells perfectly
2. perfect width - both visually and to protect wheels
3. perfect height - no rubberband or 4x4 look
That looks really nice! 
How is the ride compared to 17"? In comparison, I'm running 215/45/17 on ATS Comp Lites (17x7.5)
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