another wheel fillment question...

[turbo2nr]

im looking into a new set of rims.. please dont flame me.. but

i was looking to get rota p45r in gold 18x9.5 +30 all the way around..

question i know the 9.5+30 is ok for the rear but will the front clear z brakes and coils? im thinking not.

I have 25mm spaces. So new rim sizes would be 18x9.5 +5 all the way around.

will those fit with a minor roll? or will i need a huge pull.

btw tire size will be 235/40/18 f. & 255/40/18 rear. will that work?

help please
Modified by turbo2nr at 11:21 AM 2/9/2008

[yokota180sx]

lol why the hell would you stagger tire sizes on the same size wheel?

make htem 9/5 +15 all around and call it a day

[adrianfromthecastle]

make htem 9.5 +15 all around and call it a day

I have 25mm spaces. So new rim sizes would be 18x9.5 +5 all the way around.

will those fit with a minor roll? or will i need a huge pull.

you're gonna need a slight pull, depending on how much camber you decide. If I were you, I'd go with possibly a 235/35 for better fender clearance

[turbo2nr]

SO i should cut down the spacers to a 15mm ? and run a +15 offset?

i wanted to run 255 in the back for traction with 225 in the rear i just spin the tires when boost hits..

[adrianfromthecastle]

SO i should cut down the spacers to a 15mm ? and run a +15 offset?

that would be ideal. It should look close to perfect on an s14.

and btw, please dont run a staggerd tire set-up on an all around same size wheel. LOL

and FYI 255/40 on a 9.5+15 isn't gonna work without some major pull + camber in the rears

[turbo2nr]

damm .. i was hoping to squeeze 255 in the back..

what if i was running a 9.5 +20 out back? could i make the 255 work with a slight roll? i really don't like the idea of not having traction..

[whiterps13]

First off, your idea of more rubber=more grip is flawed.

A sticky 225 is going to provide you just as much traction as a 255, with more positive effects in other areas (fender clearance, sidewall rollover, predictability at the limit of grip, etc.).

Please get over the idea of squeezing as much tire as possible into the rear. Run 18x9.5 +15 with 235/35's all the way around and you will be fine. Tires will be cheaper than your planned 255 width, so you can step up to a stickier, more dry-grip oriented tire. Plus, a 235/35 is a common tire size so you should have more options..

[turbo2nr]

wouldnt a 255 have more of a contact patch then a 235?

also i was hoping to stay with a 40 series side wall becasue i live in nyc and the road here suck, i could use a little mean on the wheel for protection against pot holes and such. also i daily the car, i probably put on 60m a day, so i need a tire that is streetable and that will perform well in wet and dry condition so i wont be going with a crazy race tire like a rt615 or something of that nature..

[whiterps13]

See that is where most people go wrong. A wider tire doesnt increase contact patch one bit, it simply changes the shape of the contact patch. The only thing that will increase contact patch is the addition of more weight to the vehicle.

I could sit here and go on and on, but heres a copy and paste from the Tire FAQ loacted at the top of this sub-forum.

"Think about your tire as a balloon (more accurate than most people think) holding the weight of your car up. Now, if you place a balloon on the ground, it has a certain area that contacts the ground, this is the 'contact patch', now you can make the patch wider(wider balloon) but the total rear remains the same, because the pressure on the balloon is the same.

Now, what does this mean to YOU? It means that since the same amount of tread is in the contact patch area between either tire, 'grip' should be the same. Thusly, the only things affecting grip(since the area of potential contact is the same) are tread design and friction(tread compound) and finally how well the suspension does a job of keeping the tire in optimum contact with the road surface.

Unfortunately it is not that simple. A wider tire does have some benefits over it narrower counterparts, with a wider contact patch comes a bit better lateral stability(to a point, lateral stress doesn’t vary THAT much between narrow and wide tires), but sacrifices some ride comfort, and less noise cancellation(in theory). This can both generate quicker turn-in and, since the treadblocks are wider, less tread squirm which can increase total available cornering force. Also of note, a wider tire generates more rolling resistance than a narrow tire."

I couldnt have said it better.

[yokota180sx]

LOLbtw, i have a 225/40 on a 10j, with 300+ HP

and i dont spin tires when boost hits. your little puny sr wont if you have one

[turbo2nr]

actually its a ka-t w/ a t4 62-1@12psi making around 350whp.. on a 2800lb car.. wheels spin major..

[yokota180sx]

actually its a ka-t w/ a t4 62-1@12psi making around 350whp.. on a 2800lb car.. wheels spin major..

than get a more linear turbo and it wont.

[hannibal]

^ haha youve got an answer for everything...

Rota makes those in offsets under +30.http://www.rotawheels.com/p45r.php

[slik_s13]

LOLbtw, i have a 225/40 on a 10j, with 300+ HP

and i dont spin tires when boost hits. your little puny sr wont if you have one

LOL