K20A_EH

I am thinking of getting 15x9 +36 wheels (with 225/45-15 toyo R1R tires).... but i have no idea if they are going to fit and what issues i am going to run into....

im sure i will have to roll and pull the fenders ... i want to avoid fender flares...

if anyone has 225/45-15 tires mounted on 15x8 rims id like to see a picture of those also ..

nsxtasy

15x9? Is that a joke?

And the Toyo R1R doesn't come in 225/45-15.

old man neri

Two questions:

1) What car is this for?
2) What exactly is your end goal, what are you trying to accomplish?

Oh, and chances are 15X9 will rub and you won't be able to get a correctly size tire. Just tell us what you are trying accomplish and we can then help you do it.

K20A_EH

toyo r1r release is pending if not out yet i need to call toyo on it, it was to be released in June i think sizing spec is 15x8.5 at most so i think 15x9 should be ok....

949racing sell's 15x9 wheels i seen someone on here run 15x10's and 15x8.5 keizer custom rims i think or kodiak... ive seen people fit 15x8's no problem... but with little skinny tires stretched to the extreme...

ive been building my car for the past 3 years....with road race and autocross in mind...

i used to run a staggered wheel setup on it of 15x7 front and 15x6.5 rear (lower offset in front).... it felt amazing so i wanted to push it alittle more

car will see the street 3 days a week

K20A_EH

im just wondering if 15x9 would be too extreme.... my other idea was 15x8 rims with 205/50-15 toyo r1r's these are like 1/2" wider then AZENIS

nsxtasy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by K20A_EH &raquo;</TD></TR><TR><TD CLASS="quote">toyo r1r release is pending if not out yet i need to call toyo on it, it was to be released in June i think sizing spec is 15x8.5 at most so i think 15x9 should be ok....</TD></TR></TABLE>

BAD IDEA. They don't just pick these numbers out of a hat; they do engineering analyses to see what point the tires get overstressed. If they say don't go wider than 15x8.5, then don't go wider than 15x8.5. And if you think you might get 205/50-15 tires at some point, don't go wider than 15x8.

K20A_EH

ive seen a few of miata guys running the 205/50-15 r1r's on 15x8 rims and the tires are rated at 7.5 max width...

some people running 225's on 15x9 rims

i think 15x8 might be more practical

so is anyone running 15x8 with wide tires.... no little stretched tires..

old man neri

Okay, let me ask you this: Why do you want wide rims and wide tires? It won't get you more grip.

K20A_EH

im taking the staggered setup to the extreme wider stance wider contact patch.... only running 15x7 in the rear....

i read at some point width will start to kill horse power?

old man neri

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by K20A_EH &raquo;</TD></TR><TR><TD CLASS="quote">
i read at some point width will start to kill horse power?</TD></TR></TABLE>

I really don't know. I suppose wider tires and wider rims to weigh more and thus will be harder to accelerate.

Again, I really don't know. My only suggestion is to not exceed the tire manufacturer's approved rim widths.

K20A_EH

15x8.5 would be my target width but thats pretty rare in a 1 peice wheel

nsxtasy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by K20A_EH &raquo;</TD></TR><TR><TD CLASS="quote">im taking the staggered setup to the extreme wider stance wider contact patch.... only running 15x7 in the rear....</TD></TR></TABLE>

If you are looking for better grip, get better, stickier tires. Wheels wider than 15x7 are not going to give you any better grip at all.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by K20A_EH &raquo;</TD></TR><TR><TD CLASS="quote">i read at some point width will start to kill horse power?</TD></TR></TABLE>

Wider wheels and tires will hurt your acceleration due to the larger diameter of the tires (it's like getting taller gears) as well as greater weight. Wider tires (not wider wheels, except as needed to accommodate those tires) can help cornering on a racetrack, but won't make any difference in street use.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by K20A_EH &raquo;</TD></TR><TR><TD CLASS="quote">ive seen a few of miata guys running the 205/50-15 r1r's on 15x8 rims and the tires are rated at 7.5 max width...</TD></TR></TABLE>

Just because people do it, doesn't mean it's safe.

Suppose there's a 10 percent chance of tire failure with those sizes. You might run into people who don't have a problem. But do you REALLY want to take a 10 percent chance of tire failure?

Don't be stupid. Stick with the tire manufacturers' guidelines for rim width.



Modified by nsxtasy at 4:05 PM 10/19/2008

alphalanos

Youre stuck in the wider is always better mentality. As was mentioned. Get wheels that will fit and some GOOD tires.

Cuda

iTrader: (1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by old man neri &raquo;</TD></TR><TR><TD CLASS="quote">Okay, let me ask you this: Why do you want wide rims and wide tires? It won't get you more grip. </TD></TR></TABLE>

you sure about that?? im not very knowledgeable, but then why do drag racers have wide *** tires and wheel when they drag...??

nsxtasy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cuda &raquo;</TD></TR><TR><TD CLASS="quote">you sure about that??</TD></TR></TABLE>

The principal factor in performance is the design of the tire (i.e. the make and model), NOT the width of the tire.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cuda &raquo;</TD></TR><TR><TD CLASS="quote">why do drag racers have wide *** tires and wheel when they drag...??</TD></TR></TABLE>

We're talking about street tires in this topic. Not drag racers.

K20A_EH

im just out for better handling (street/track car)

ChuckNorris

poke it and stretch it!

gangster style.

nsxtasy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by K20A_EH &raquo;</TD></TR><TR><TD CLASS="quote">im just out for better handling (street/track car) </TD></TR></TABLE>

If that's really what you're looking for, then stick with 15x7 rims, with 205/50-15 R1R or Azenis.

K20A_EH

ok dos anyone have pictures of LOW OFFSET wheels for road race/ street use

not that drifter style ****!!!

K20A_EH

15x7.5 +20 would fit under the oem fender's with 205/50-15 toyo R1R tires (front only)

Root of all Evil

motortrend tested the 97 itr to .93g on the skidpad using the stock 6'' rim and 195/55/15

K20A_EH

yeah i get what your saying... 15x9 might be over kill but just wondering about fitting them

rogueeg6

iTrader: (1)

you can fit 205's on a 9 inch rim but ur streaching the tire alot the only reason of putting that tiny tire on a wide rim is for that deep dish rim not to rub as bad it makes the tire more like a bubble but u will have very bad tire wear they dont do it for better handling its all about the look im sure when and if them cars get raced or go to the track they change rims but u can do it

nsxtasy

You can do it, but it's also UNSAFE. Mounting a tire on a rim that's wider than the range of widths approved by the tire manufacturer results in excessive stress on the sidewalls, which makes heat build up there. This can lead to tire failure (blowout). DON'T DO IT.

K20A_EH

if i finally go with 15x9 im going to run 225/45-15 tires ... says up to 8.5" width... so i dont think 1/2" of stretch will be to much stress

but im pretty sure im going with 205/50-15 toyo r1r on a 15x8 +30 (those 205's are approved to 7.5 so its the same difference)

not too extreme of a stretch

those cars look hella dope... but that DA is pushing the limit