18" rims
98EclipseGS
06-05-2002, 10:55 PM
i'm looking to put 18" rims on my eclipse. its a 98 Eclipse GS. What all will i need to do to make them fit?? will i need new chamber's, etc. what all would i need????
w8n4myevo
06-07-2002, 12:45 PM
I almost decided to do the same thing, you will need a set of springs and shocks so that the body cant travel as far down and dont run anything over a 40 series tire. Do this the right way and you shouldn't have a problem
98EclipseGS
06-11-2002, 03:18 PM
well im getting a set of Eibach Pro-Kit lowering springs (1.3" drop in the front and back). but what brand should i get for the other things i need? and if ya can put a web address next to it if ya can. Thanks for your help.
w8n4myevo
06-28-2002, 08:35 PM
Got some new info for you,
the Rs comes stock with 14" and a 70 series tire
A 17" rim with a 40 series tire is the exact same tire
A 18" rim with a 35 series tire is the exact same as both listed above
A 19" rim with a 30 series tire is the exact same as all listed above
Do you see the way this works? Every inch you gain in Rim size decrease the sidewall height (series) 5 points and you will still have the same size when all said and done.
the Rs comes stock with 14" and a 70 series tire
A 17" rim with a 40 series tire is the exact same tire
A 18" rim with a 35 series tire is the exact same as both listed above
A 19" rim with a 30 series tire is the exact same as all listed above
Do you see the way this works? Every inch you gain in Rim size decrease the sidewall height (series) 5 points and you will still have the same size when all said and done.
98EclipseGS
06-28-2002, 09:35 PM
Yeah i got it thanks
w8n4myevo
06-28-2002, 09:39 PM
:smoker2: Not a prob! I do have one question for you though. Do you know of any things to look out for when lowering a car by yourself except for the tension of the springs?
ECTurboGSX
06-28-2002, 11:00 PM
Got some new info for you,
the Rs comes stock with 14" and a 70 series tire
A 17" rim with a 40 series tire is the exact same tire
A 18" rim with a 35 series tire is the exact same as both listed above
A 19" rim with a 30 series tire is the exact same as all listed above
That isn't exactly correct. There are three numbers in a tire size. The first number is how wide the tire is. This is an independent number, and is measered in mm (i think). A stock RS tire is 195 wide. But, you have a GS, and your stock width is 205. The stock tire on a GS is 205/55/16. The second number in the series is your sidewall profile. This is a DEPENDENT number, and is a ratio to the first number. Therefore, a 205/55 will have a shorter sidewall when compared to a 225/55. This is why the above info is incorrect. This is assuming that you keep the same width on the tire, which won't happen with 18s. The stock GS wheel is only 6 inches wide, where the 18 will be between 7 and 8. DO NOT GO WIDER THAN 8 INCHES ON THE WHEEL. Your optimum tire size for an 18x7 would be 225/35/18. Also, from what I have seen, the RS rolling diameter is smalled than the GS and above. For the RS at an 18, you would use a 215/30/18. The best way to do it is to find a rolling circumfrance calculator. I know one of the big Miata sites has one, but I don't remember the addy.
the Rs comes stock with 14" and a 70 series tire
A 17" rim with a 40 series tire is the exact same tire
A 18" rim with a 35 series tire is the exact same as both listed above
A 19" rim with a 30 series tire is the exact same as all listed above
That isn't exactly correct. There are three numbers in a tire size. The first number is how wide the tire is. This is an independent number, and is measered in mm (i think). A stock RS tire is 195 wide. But, you have a GS, and your stock width is 205. The stock tire on a GS is 205/55/16. The second number in the series is your sidewall profile. This is a DEPENDENT number, and is a ratio to the first number. Therefore, a 205/55 will have a shorter sidewall when compared to a 225/55. This is why the above info is incorrect. This is assuming that you keep the same width on the tire, which won't happen with 18s. The stock GS wheel is only 6 inches wide, where the 18 will be between 7 and 8. DO NOT GO WIDER THAN 8 INCHES ON THE WHEEL. Your optimum tire size for an 18x7 would be 225/35/18. Also, from what I have seen, the RS rolling diameter is smalled than the GS and above. For the RS at an 18, you would use a 215/30/18. The best way to do it is to find a rolling circumfrance calculator. I know one of the big Miata sites has one, but I don't remember the addy.
nismo4banger
10-11-2002, 12:10 PM
www.miata.net/garage/tirecalc.html
This is a helpful tire calc.
This is a helpful tire calc.
turboracergsx
10-18-2002, 10:58 AM
18's with an eihbach sportline dropping 1.3 inches looks bad ass.
Automotive Network, Inc., Copyright ©2026