Yes; As i'm thinking HotRodz has a set of 18x10.5+30's & currently rolling on 18x11+18's w/315's on all 4 corners.

What would be the best tire size combo for these specs?

Base Z
19x9.5 +22 (or +15)
19x11 +15

Still deciding what I want for up front, but what which offset between the 2 (+22 or +15) will give me a more flush look up front? I am currently on stock height, but I plan on lowering down a little bit to clear the wheel gap after the 19s go on.

The "Will it fit?" thread
 

Short answer:

Option 1: 245/40 & 285/35 slight stretch

Option 2: 265/35 & 305/30 no stretch

Option 3: 275/35 & 325/30 meaty

All depends on your use case scenario.

And for the offsets +22 & +15 works for flushyness just have to take into account akebono clearance if need be.

I currently don't have akebonos, just the base brakes. I do plan on upgrading to those, but that's not until far into the future.

Hai Gais

Just a quick question more than anything.

Looking to run 18 x 10.5 +15 squared.

Tires sizes is my only concern.

tires im looking at are 275/40/18
should i stagger that sidewall like i see most others do make it 40 front and 35 rear or would 40 all 4 corners be fine ?

Lowered on swifts FYI

Thanks! <3

Figured it out.
thought there was another reason besides the tires over all size of the tire. 275/40/18 will work for all four corners no prob :D

wheel question: If I decide to purchase a set of forgestar f14 wheels (the polished copper version is calling my name!!) do I need to get longer wheel studs as well, or will the new wheels and lugs be safe on the OEM studs? My Z is a new 2018. I have read that some aftermarket wheels do not allow a safe amount of grab for the lug nuts on the OEM studs and just want to know all that will be needed to use a set of F14's.

skidro

I have f14s, did not change studs, but you'll need aftermarket lug nuts as the oem will not fit or sit properly.

I use project kic r40 lug nuts.

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Yes...... knew I would need new lug nuts as well, but was just concerned about length of factory stud being sufficiently long enough. I take it you have had no problems using the F14's on the stock studs and had plenty of stud length for the new lug nuts?

skidro

Yes, I'm not using any spacers, and had plenty of turns on the stock studs. As long as you get the recommended specs (width and offset), you'll be fine on stock studs.

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Hey guys,

I'm looking to grab bigger rear tires on the 2015 stock 18's oem tires.
.
Here is the plan:

Move stock rears to the front and buy x2 g-Force COMP-2 A/S 275/40/18's for the rear (need all season to finish up the last couple months left of winter here). The only other options for that tire is 255/45/18. They seem to get great reviews even in light snow.

My questions:

Will I get better grip with the wider rear tires? Especially on cold streets.
Will the driving/handling be drastically affected?
Will this look good on stock suspension (fitment/fender gap/bubble)?
When I get swift spec R springs, will these tires still fit all the way around?
Can I still add spacers with that set up (including springs) without rubbing?

Also, if you have better options as well as spacer specs, feel free to chime in.

Thanks guys.

P.S. I think I posted this in the wrong place before, so my apologies for the double post.

245/45,275/40/18 is uniform & looks good on the 8,9” Wheels.
Ride quality should be better (pending tires)
Traction will be similar-I ran the 225/50,255/45 combo for the function (cold & ugly winter weather)...but dang them tires are skinny.
Ride quality increased for me with fatter meats-but there’s a trade off on fuel consumption and cost....but you’re not getting close to that ballgame w/245/275’s.
Try to keep same tread compound for best traction & handling.

Excellent. Thank you so much for the response. I'm definitely going that route.

Do you know if you can drop it 1.2" using that same setup without having rubbing issues?

Also, with that drop and wheel/tire combination do you have any spacer experience/advice? I actually like the stock 18's, I just want to close the fender gap.

This is an old picture with 20mm front & 5mm rear spacers...you may want to lower it before you purchase spacers/so you’ll be more accurate when measuring for them.
Unsure if you’re purchasing all required parts to keep your alignment in check.https://uploads.tapatalk-cdn.com/201...abf2d55985.jpg


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Just ordered my works....

9.5" +10 front
11.5" +15 rear

Im expecting around -3 rear camber on 315s