car lifted up half an inch after new wheels

[nsxtasy]

Im just expressing what happened with me. My oem wheels have stock sizes. I think your confused, so I will summarize. My car when stock was at 5.3 in the front(measuring from the ground to the bottom of the jack point in the front) after installing the h&r suspension it lowered it to 3.5ish after installing new rims it raised it to 4. That's with 215/35/18 front tires, very popular choice with 18/19 set up. If some one else can chime in.

I think YOU'RE confused, so I'll review.

Your car may have gained in height because the make and model of your tires may run large in the 18"/19" sizes, even though other makes and models of tires may not.

Your car may also have gained in height because your old tires were worn and your new tires were new. The difference in tread depth can raise your car 1/4", all by itself. And this happens even when you're not changing the size of your wheels or tires.

I'm not saying your car didn't increase in ride height by .5". It's quite possible that it did. However, it did not increase in ride height by .5" just because you switched to 18"/19" wheels.

 

[V.Lats97nsx]

When you did the measurement with the 18/19 setup, did you:
1) Measure it immediately after dropping the car off the jack (like not drive it around)?
2) Measure it with the sideskirts and rear bumper removed?
3) A combination of both (1) & (2)?

The combination of 1and 2, so basically im wondering now if the suspension has to settle with the rims. I didn't want to sound stupid. I tried searching about the issue. I didn't think that would make sense that the suspension would need to settle after installing the new rims. So follow me for a second, according to the tire height chart. The 215/35/18 is almost half an inch higher than the oem tires. So then it made sense that the car got higher by half an inch. What im wondering for those that run 205/40/17 in the front which is 1/4" shorter than oem tire size will it lower the car the 1/4 inch.

 

[V.Lats97nsx]

I think YOU'RE confused, so I'll review.

Your car may have gained in height because the make and model of your tires may run large in the 18"/19" sizes, even though other makes and models of tires may not.

Your car may also have gained in height because your old tires were worn and your new tires were new. The difference in tread depth can raise your car 1/4", all by itself. And this happens even when you're not changing the size of your wheels or tires.

I'm not saying your car didn't increase in ride height by .5". It's quite possible that it did. However, it did not increase in ride height by .5" just because you switched to 18"/19" wheels.

Im not trying to disregard your comment. The fact that my car has low mileage and the stock tires have about 75 to 80% tread left. My point out of this entire post that some people might have to experience this. A .5 inch height change. It might be helpful to some. If i knew this was going to happen before I bought the rims. I would of went with the 17/18 with 205/40/17 to even get a lower look. Im just saying people are doing small drops and going to bigger setups not knowing that they are not dropping the car as much as they think. So too all the people that are looking into doing a bigger rims and lowering the car for a look they desire. You might argue but its something someone will have to argue.

 

[gabedm]

Hey guys. I bought some new rims. 18x8 with 215/35/18 tires. And rear 19x9.5 with 265/30/19. My car was lowered with the sport cup suspension with 1.7inch drop in the front and 1.6 in the rear. After installing the new rims It looked alot higher. A little over half an inch. This sucks I loved how the car looked before with the stance. Do I now lower the car an additional half an inch. I don't even know how to go about doing this. Any advice would be appreciated.

this has the makings of "thread of the year"

So, how big was your previous rim/tire setup?

 

[nsxtasy]

The 215/35/18 is almost half an inch higher than the oem tires.

No, it isn't. The calculated outer diameter of your stock 215/45-16 front tire is 23.62". The calculated outer diameter of a 215/35-18 tire is 23.93". So the difference in diameter is 0.31".

Half of the diameter is above the center point of the wheel, and half is below the center point of the wheel. So only half of the difference is the amount of the change in the ride height. That's 0.15", like I stated above.

A 215/35-18 tire will result in an increase in ride height of 0.15" compared with a 215/45-16 tire, assuming nothing else is different (i.e. same tread depth, same accuracy of the tire sizes, etc).

What im wondering for those that run 205/40/17 in the front which is 1/4" shorter than oem tire size will it lower the car the 1/4 inch.

Well, first of all, the best 17" front size for the NSX is 215/40-17. The outer diameter of 215/40-17 is 23.77", which is 0.15" larger than the diameter of the stock '94-01 size of 215/45-16. Again, the difference in ride height is only half of the difference in diameter, so 215/40-17 will raise the car by 0.08". NOT 1/4".

Why are you asking about 205/40-17? I don't know anyone who uses 205/40-17 in the front on an NSX. Almost everyone I know with 17" front wheels uses 215/40-17, except for a few people who use front tires that are larger than that (particularly for racetrack use).

 

[V.Lats97nsx]

No, it isn't. The calculated outer diameter of your stock 215/45-16 front tire is 23.62". The calculated outer diameter of a 215/35-18 tire is 23.93". So the difference in diameter is 0.31".

Half of the diameter is above the center point of the wheel, and half is below the center point of the wheel. So only half of the difference is the amount of the change in the ride height. That's 0.15", like I stated above.

A 215/35-18 tire will result in an increase in ride height of 0.15" compared with a 215/45-16 tire, assuming nothing else is different (i.e. same tread depth, same accuracy of the tire sizes, etc).


Well, first of all, the best 17" front size for the NSX is 215/40-17. The outer diameter of 215/40-17 is 23.77", which is 0.15" larger than the diameter of the stock '94-01 size of 215/45-16. Again, the difference in ride height is only half of the difference in diameter, so 215/40-17 will raise the car by 0.08". NOT 1/4".

Why are you asking about 205/40-17? I don't know anyone who uses 205/40-17 in the front on an NSX. Almost everyone I know with 17" front wheels uses 215/40-17, except for a few people who use front tires that are larger than that (particularly for racetrack use).

Check this post out. Same rims, but 17/18
http://www.nsxprime.com/forums/showthread.php?p=1394038

 

[nsxtasy]

Im not trying to disregard your comment.

Yes, you are. Because you are still insisting that the change to 18"/19" wheels was responsible for your 0.5" change in ride height, which is NOT TRUE. The difference due to your wheel and tire sizes is 0.15" front and 0.27" rear. As previously mentioned, there are a lot of things that can contribute the rest of the difference. Part of it is the difference in tread depth. Part of it is differences in actual tire sizes from one make, model, and size to another. The ride height can also change based on how much weight is in the car, and what the air pressure in the tires is. All of those things together may add up to a 0.5" difference in ride height. If you want to stop disregarding what I've said, then you need to realize that the difference due to switching to 18"/19" wheels is less than that amount.

Or, you can keep saying the same WRONG thing over and over again...

 

[nsxtasy]

Check this post out. Same rims, but 17/18
http://www.nsxprime.com/forums/showthread.php?p=1394038

You claimed that he lowered his car with the 205/40-17 front tires, but he actually raised it. Since his car is a '91, it came with smaller front tires than your '97. The outer diameter of 205/40-17 is actually larger than his stock 205/50-15 (23.46" vs 23.07"0. Still, I think 215/40-17 is a better choice for any year NSX with 17"/18" wheels.

Sounds like you have trouble understanding things, because that's the only reason I can think of why nothing anyone here says seems to sink in, and you keep ranting on about stuff that's totally irrelevant or that's just plain wrong.

 

[gabedm]

you ever thought that car car might need to settle?

That can take a day or so after you jack it up.

Either way, you put bigger rims on your car, and your vag hurts cause your car was raised? Where do we find these owners?!? Seriously, buy fucking coilovers if you want your car lowered.

You need to do your research. There are HUNDREDS of wheel/tire calculators on the net. TONS. Its not hard to figure out how much your setup will add, you can even calculate how much your air pressure will effect it.

Seriously, this site is full of some of the dumbest car enthusiasts on earth.

 

[V.Lats97nsx]

So you found one post where one guy used undersized front tires. I bet I can find one where someone is using 195/40-17. So what?

Sounds like you have trouble understanding things, because that's the only reason I can think of why nothing anyone here says seems to sink in, and you keep ranting on about stuff that's totally irrelevant or that's just plain wrong.

Haha not only have you offended me but you offneded the person with the 205's and angus who's a great guy, and he's the one that helped me with my wheel purchase. Honestly your being ignorant from your first post on this thread. Honestly with 25000 posts you probably seen it all. My father taught me to respect people. But please don't nag on me like im mentally retarded.

 

[V.Lats97nsx]

you ever thought that car car might need to settle?

That can take a day or so after you jack it up.

Either way, you put bigger rims on your car, and your vag hurts cause your car was raised? Where do we find these owners?!? Seriously, buy fucking coilovers if you want your car lowered.

You need to do your research. There are HUNDREDS of wheel/tire calculators on the net. TONS. Its not hard to figure out how much your setup will add, you can even calculate how much your air pressure will effect it.

Seriously, this site is full of some of the dumbest car enthusiasts on earth.

Im addressing a concern that might happen to some people, that go the route I did. Im not here to disrespect anyone.

 

[Hapa88]

The combination of 1and 2, so basically im wondering now if the suspension has to settle with the rims. I didn't want to sound stupid.

The suspension has to settle. You can't measure it immediately after dropping it off of the jack. You, at a minimum, need to drive it around the block and then remeasure.

The wheels and tires are unsprung weight. Therefore they have NO BEARING on the weighing the rest of the car down that is supported by the springs. You could add 600 lb bricks on all 4 corners as the wheels and the ride height (the amount of spring compression) would remain exactly the same.
http://en.wikipedia.org/wiki/Unsprung_mass

The 215/35/18 is almost half an inch higher than the oem tires. So then it made sense that the car got higher by half an inch.

It doesn't make sense. The car will lower by half of the diameter difference (so 1/2" x 1/2 = 1/4" lower).

 

[V.Lats97nsx]

The suspension has to settle. You can't measure it immediately after dropping it off of the jack. You, at a minimum, need to drive it around the block and then remeasure.

The wheels and tires are unsprung weight. Therefore they have NO BEARING on the weighing the rest of the car down that is supported by the springs. You could add 600 lb bricks on all 4 corners as the wheels and the ride height (the amount of spring compression) would remain exactly the same.
http://en.wikipedia.org/wiki/Unsprung_mass



It doesn't make sense. The car will lower by half of the diameter difference (so 1/2" x 1/2 = 1/4" lower).

The wheels have been on the car for a week. I measured again and it didn't change. The car is apart so I can't drive it yet.it should be done by this weekend, I will drive it around and then remeasure. Im hoping for it to settle that quarter inch..

 

[gabedm]

how much were your rims?

 

[V.Lats97nsx]

how much were your rims?

The rims with tires balanced were given to me by dealer cost by a friend at 1400