Official Wheel and Tire Fitment Thread

[nickalltogether]

I'm looking at wheels that are 17x8 ET+35, I've done the math and looked at several different sites. And I'm pretty sure they will be pretty close to flush without a spacer. Am I correct?

These are 18x8.5 +35 with a 225 tire. By running an 8inch wide wheel you'll get about 7mm less poke than what I have there. Won't look bad, but could also still run a 5 to 10mm spacer.

 

[boostiboo]

So im currently looking at some Motegi mr116 18x8 45mm offset 5x105 paired with some 215/40ZR18 Y CONTINENTAL® - EXTREMECONTACT DWS06 tires, now the car will be lowered a bit, along with some camber not exceeding -1.0 degrees, but im going wih adjustable coilovers, so i can get that perfect fit. im just curious if this setup will incure any problems?

 

[nickalltogether]

So im currently looking at some Motegi mr116 18x8 45mm offset 5x105 paired with some 215/40ZR18 Y CONTINENTAL® - EXTREMECONTACT DWS06 tires, now the car will be lowered a bit, along with some camber not exceeding -1.0 degrees, but im going wih adjustable coilovers, so i can get that perfect fit. im just curious if this setup will incure any problems?

There's a good chance you'll have clearance issues on the inside. To remedy this you can run a 5mm spacer on stock wheel studs.

 

[boostiboo]

cool, ill look into it. im thinking of possibly stretching tires but idk if thatll help my clearance issues or not, plus cops here in wichita are ticket happy, my buddy just got one for stretched tires but they were also 9 inch tires stretched on 11's

 

[nickalltogether]

cool, ill look into it. im thinking of possibly stretching tires but idk if thatll help my clearance issues or not, plus cops here in wichita are ticket happy, my buddy just got one for stretched tires but they were also 9 inch tires stretched on 11's

Clearance issues will be with the actual wheel and strut. Like I said, you might get away without the spacer, but I kinda doubt it.

 

[boostiboo]

im gunna have to borrow some wheels form other friends and do mock ups just to see

 

[nickalltogether]

Not sure which model of Sonic you have, but if you have an LTZ the factory wheels is a 6.5" wide with et42. An 8" wide et45 will be 22 millimeters closer to the strut. So you could just compare with your stock wheels to get at least some idea.

 

[boostiboo]

yea ive got a 2012 ltz sedan, i got a buddy on base that got 20x8.5 on his r34, they wont bolt up but ill be able to get an idea of how close they are to the strut without a spacer

 

[Llia]

18x8 , 5x105 , Offset: +35mm So these are okay without spacer?
I'm not lowered. Also what was the correct tire size?

Thanks in advance.

 

[TheGreenDragon]

18x8 , 5x105 , Offset: +35mm. So these are okay without spacer?
I'm not lowered. Also what was the correct tire size?

Thanks in advance.

Weeeeell let's see here... *goes off to check website calculator like a nerd*

It would appear that your rim will be a mere 5mm closer to the suspension, so you should be just fine. Rim will stick out 35mm farther toward the fender.

If you want to try to match the original diameter of your tires so you don't end up with wonky/inaccurate speedometer readings you should consider a 215/40r18 or a 245/35r18 tire. If you go with the wider tire, the rubber will be 6mm closer to the suspension, which is still not a problem.

One other side effect to note is that you will have a very small (roughly 15mm increase) change to the tire scrub radius, which might change the car's handling ever so slightly.

Hope that helps.

 

[nickalltogether]

18x8 , 5x105 , Offset: +35mm So these are okay without spacer?
I'm not lowered. Also what was the correct tire size?

Thanks in advance.

Those will fit fine. I would run 225/40/18 on them

 

[The Champ]

Those will fit fine. I would run 225/40/18 on them

That is nearly the exact OE tire height. OE was right about 25" regardless of whether you had 15, 16 or 17" wheels from the factory.

 

[Llia]

Weeeeell let's see here... *goes off to check website calculator like a nerd*

It would appear that your rim will be a mere 5mm closer to the suspension, so you should be just fine. Rim will stick out 35mm farther toward the fender.

If you want to try to match the original diameter of your tires so you don't end up with wonky/inaccurate speedometer readings you should consider a 215/40r18 or a 245/35r18 tire. If you go with the wider tire, the rubber will be 6mm closer to the suspension, which is still not a problem.

One other side effect to note is that you will have a very small (roughly 15mm increase) change to the tire scrub radius, which might change the car's handling ever so slightly.

Hope that helps.

Scrub Radius

So is that increase negative or positive?

 

[MyLonewolf25]

Scrub Radius



So is that increase negative or positive?

You'd get more I think... so positive?


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[Llia]

Just that the video i linked to said there are two types of Scrub area. If ours is already positive then it's more positive, but if ours is negative, then more negative is still negative.

 

[MyLonewolf25]

*shrug* no clue
My guess is it depends on how you space it and in total of the contact patch is moving farther outward or not


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[TheGreenDragon]

Scrub Radius

So is that increase negative or positive?

Sorry I didn't respond sooner. The forums has been behaving very odd lately. It wasn't updating any posts for me, at all. So until I logged out today and logged back in, the forum was showing no new activity for 2 days...

Anyway, to answer your question, you would be increasing your scrub radius +15. So, positive. Which means the front tires will want to toe-in during acceleration and toe-out during braking.

 

[Llia]

It wasn't updating any posts for me, at all. So until I logged out today and logged back in, the forum was showing no new activity for 2 days...

oh, so it wasn't just me. I was clearing my internet cache just in case. Sometimes the site would go into a posting loop after I reply and keep loading and reloading the page.

 

[MyLonewolf25]

What are you guys using
The browser site or the phone app thing? Ive nothing a stark difference between the two


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[MyLonewolf25]

How would a 15x7 et38 fit?
Or a 17x7 +40 mm offset

Also what's the smallest spacer I can get that I can change the lug pattern to 5x100?
( I can find a lot of 5x100 wheels )

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