guys, i had 16s before and i followed the stickies here about putting the correct tire size, so.....I bought 17s with 205/45 tire size,my problem is the fender gap, my ride height had increase too. I'm on eibach pro-kit. and I want to lower it more.do you guys have any suggestion for alternative springs??? am thinking of putting an eibach sportline or skunk2. what do yo guys think?(please don't tell me to put air suspension
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1) the gap didnt increase, you decreased your overall tire diameter. you want a 215/45 or a 225/45 tire. as far as going lower, yes you can buy you need struts if your on stock struts
Quiklilcav wrote:ryan99 wrote:guys, i had 16s before and i followed the stickies here about putting the correct tire size, so.....I bought 17s with 205/45 tire size
Doesn't sound like you followed the stickies, and there is no way putting on 205/45/17's increased your height, unless you had the wrong size on your 16's before, but since your gap increased, I'm betting on no.
his height didnt increase or decrease, it stayed the same.
yes, i know i should have put 215/45/17 , but I did that already and it was very wide for me(appearance) so I changed to 205/45 and I liked it, I even thought of 205/40 for the looks. anyways, thank you guys, I guess i will need to lower it more.
215 is too wide? Isn't that the stock width on 3rd gen Zs?
Um, yeah.. you need some 225/45's on there.. trust me. Has a perfect amount of sidewall for a 17" wheel.
1983 Camaro Z28
205/55 R16 is stock on 3rd gen Z's
Ever heard of Plus One Sizing? To do this add 10mm to the section width, subtract 10% from the aspect ratio (which is in percent of the section width) and add 1 inch to the rim size. For example:
Base model wheel and tire sizes were 195/65-R15 on a 15 X 6 steelie rim. The optional (standard on Z24/LS Sport) was 205/55-R16, which is the plus one size.
Now if you want to plus one the 16" wheel and tire size (plus two for the 15" rim and tire) you would go to a 215/45-R17.
This is just a rough estemation method, but is actually pretty accurate, for the most part. To get the actual correct sizing you must go the tire manufacterer's specs to get the proper size. Als o be aware of the fitment issues with the width of the rim and the backspacing / offset for proper fitment.
the 205/45 might have had the section width you were looking for, but the diameter changed also, i.e. 45% of 205mm (92.25 mm side wall) as opposed to 45% of 215 mm (96.75 mmside wall) which works out to be a 4.5mm difference for each side wall, or 9mm difference diameter. So yes you fender gap did increase whan you changed tires. (Different tire manufactureers and tire models will have slightly differnt sizes, which will make a diffence also. example, my Kuhmo Ecsta 712s ina 205/55-R16s had a diameter of 25.1". I had to replace one a couple of months ago and got a Bridgestone [what was available at the time] measured 24.9".)
If you wish to figure out your nominal tire diameter, use this formula: Tire Diameter = (SW * AR / 1270) + RD
SW being Section Width
AR being Aspect Ratio (expressed as a whole number)
RD being Rim Diameter
For example: the stock steelie base tire, 195/65-R15 or
(195 * 65 / 1270) + 15 = TD
(12675 / 1270) + 15 = TD
9.98 + 15 = 24.98"
The result here is usually rounded to the nearest whole inch, or 25".
Edited 1 time(s). Last edited Wednesday, October 31, 2007 7:19 PM
Thanks madjack, that's what i know also, "plus one sizing". I thought of that before here in the org but everyone bashed at me.hehe.guess they go by the book. and you're right also about different manufacturers have different "size" with the same tire size and diameter. i had 215/45/17 before and too much tire diameter, while my friends had nankang and federal(don't know if you've heard that) and it looks great on them. thanks everyone..
ling427ttvette wrote:Um, yeah.. you need some 225/45's on there.. trust me. Has a perfect amount of sidewall for a 17" wheel.
and its the CORRECT tire size for a 17" rim as well for our cars...
