help with 18 inch rims

[JSt86]

right now i have 17 inch rims and i want to get 18s i read a few post and it looks like 8 offset would fit is this true?

what size tire should i go with if i get 18x8 rims i want to get the most tire possible without rubbing. currently i think my tires are 225/45/17 but honestly off the top my head i am not sure

keep in mind my car is lowered an inch and a half. which tire size would give me an ok ride and not rub or woulld you guys recommend going back to stock height?

when i bought the car it was already lowered to be honest im not even sure if its really lowered an inch and a half never tried measuring the height and comparing it to stock height. i know for a fact its lowered i can tell when i look at other eclpse but im not sure how much its really lowered.

i am not sure what the suspension consist of either its petty stiff i feel most bumps with my 17s but right now with my snow tires (14 inch rims) you can still feel the bumps but its alot smoother

i know i must sound like a reatrd but i dont know much about suspension nor tires i tried reading threw the fourms and using different tire calculators but tis kinda confuisng to me

what suspensions mods would you guys recommend if i was to get 18 inch rims

 

[wret]

Figure out what offset is and you'll be halfway there.

 

[JSt86]

ok negative offset will bring the rim out more while a positve will bring the tire farther into the wheel well. but how exactly does this help me?

 

[wret]

Since you don't have a lot of room to play with, knowing the proper offset is essential to proper fit of oversized wheels and tires. A tire shop, who warrantees his work, will likely stay with conservatively small widths to avoid rubbing problems. If you want to push the envelope you are on your own and you need to educate yourself a little before making your purchases. There’s plenty of information on this board to help you.

The three tire widths you will want to investigate are:
225 – Pretty easy, safe fit. Probably the most popular choice.
235 – A little more difficult to avoid rubbing.
245 – In my opinion the widest tire you can fit under the fenders. Proper offset and tire selection are crucial.

 

[PEFXEclipse]

I wouldn't go back to original height my 95 is droped 3 inches off of factory height and im runnin 225/40/18, to this day i have never rubbed, 2g's have huge fender wells

 

[DV8]

I have 18x8 also with the same 225/40.18's and they dont ever rub

 

[JSt86]

hows the ride on the 225 tires is it comfortable or do you feel every bump? does afetrmarket shocks and springs help dampen this or how do you prevent feeling every bump

 

[gofaster87]

My Eclipse has 18x8 42+ offset I believe with 225/40/18s. Theyre a perfect fit.

 

[herostar]

225/40R18 will be your best bet

235/40R18 will probably fit allright too

 

[97 spyder]

I run 18x8.5 rims with 245/45 tires and they rub I would recomend no wider than 8" rims with 225 tires the added traction you gain from 235s would be unnoticable anyways.

 

[JSt86]

I run 18x8.5 rims with 245/45 tires and they rub I would recomend no wider than 8" rims with 225 tires the added traction you gain from 235s would be unnoticable anyways.

im more looking at ride comfort im assuming 235 would make the ride smoother then 225?
cureently my 17 inch rims are wrapped with 245 and the ride is not to bad get used to it. do you think i would be satisfied with 235?

 

[Flash]

I have 225/40/18 and I haven't rubbed yet too!

im more looking at ride comfort im assuming 235 would make the ride smoother then 225?

the 235 and 225 are just the tire width. I don't see how the tire width would affect ride comfort. If you want a smoother ride, then don't change the suspension out for an aftermarket one. Aftermarket suspensions will be stiffer than stock.

Check out this website for help: http://www.martincheck.com/wheel_tire_fitment_FAQ.html

 

[JSt86]

I have 225/40/18 and I haven't rubbed yet too!


the 235 and 225 are just the tire width. I don't see how the tire width would affect ride comfort. If you want a smoother ride, then don't change the suspension out for an aftermarket one. Aftermarket suspensions will be stiffer than stock.

Check out this website for help: http://www.martincheck.com/wheel_tire_fitment_FAQ.html

ohh oh ic so has anyone tried 225/45/18 is there a noticable difference between the 40 and the 45? i want ot try and get the most tire width as possible to make a smoother ride

 

[Omega]

A 215 tire compared to a 275 tire has nothing to do with the comfort... it's just the width. Now, a 35 profile compared to a 45 has a lot to do with comfort since it is the amount of sidewall (basicly).

Personally a 45 profile on a performance tire is fine. There is enough sidewall to save the rim from potholes and it's small enough to not get too much sidewall flex.

Look here for tire sizes: http://www.miata.net/garage/tirecalc.html

 

[FORMONTOYA]

A 215 tire compared to a 275 tire has nothing to do with the comfort... it's just the width.

not entirely true...a 215/40/18 will have a shorter sidewall than a 275/40/18 will. 40% (which is what the second number denotes...a % of the first number) of 215mm is smaller (shorter) than 40% of 275mm. the 215/40 will have a harsher ride than a set of 275/40. and then you would get into higher (harsher) spring rates of lowering springs or coil-overs, do you have poly bushings (harsher), strut bars (still a little harsher), or upgraded sway bars (harsher).


jim

 

[wret]

ohh oh ic so has anyone tried 225/45/18 is there a noticable difference between the 40 and the 45? i want ot try and get the most tire width as possible to make a smoother ride

It should fit on a wheel with 40mm offset or less.