ClickClackSmack

iTrader: (1)

Just picked some coupe 19s up for winter. Threw them on today to try and figure out which spacers to run. I'm thinking 20mm front and 15mm rear?

zubi82

I know this has been asked over and over again but I know nothing when it comes to tire sizes and wheels so If I buy a set of coupe 19s for my AWD Sedan do I need to change the stock tires or can I put them right on? I was thinking of picking up one of the used sets in the classified section with tires. So sick of my stock 17s and will do anything to get rid of them.

blnewt

iTrader: (13)

With an AWD you need to be extra careful w/ tire diameters. Usually it's stated that 3% +/- of your oem diameter and you'll be OK, but this really applies to RWDs. The AWDs (at least several on this site) seem to have issues at speeds over 80mph, the slight difference in diameters between F&R (in a staggered setup) or slight variation from OEM (when all tires are the same size) can cause your AWD, VDC, ABS to be out of acceptable range as well as the speedometer to be quite a bit off.
For a 19" setup w/ coupe wheels ideally a 245/40/19 front (or that size all around if you don't stagger) and a 285/35/19 rear will be closest to oem diameter and should be fine. A 245/40/19 275/35/19 is the next closest but might cause issues at high speed.
HTHs

ogerisg321

Don't think you need to run spacers with that fitment. They should just be bolt and go.

connoisseurr

iTrader: (5)

What are you guys using to calculate the +/- % number - overall diameter? I'm trying to figure this calculation out so I can find me a set of tires. I picked up a set of these wheels and are refinishing and powder coating at the moment. I need to get tires for them. I've never staggered and AWD car before so I'm not trying to blow anything up here.

Couldn't a 245/45-19 work for both front and rear? That size tire accepts wheel widths 7.5-9" wheels.... Let by inner noob come out here has this is not my best area of expertise. I was trying to avoid a real beefy tire like you guys have mentioned above (245 front, 285 rear).

blnewt

iTrader: (13)

You could go 245s all around, but a 245/275 stagger is about the narrowest you can go out back and still be OK w/ AWD. The tire sizes need to be 245/40/19 & 275 or 285/35/19 though.
Here's the calculator so you can mess w/ the numbers~
https://www.myg37.com/forums/tire_rim_calculator.php
It's best to be within +/- 1% diameter difference w/ AWD or up to 3% RWD.

connoisseurr

iTrader: (5)

Thanks for that Brad. I'm looking at getting a 245/45-19 all around. It looks like that will be ok for the front and rears without having anybody error with the AWD system, am I correct?

blnewt

iTrader: (13)

Hey Connor, hope all is well . You must use the 40 series though so 245/40/19 is what you need, the 245/45/19s are too tall.

connoisseurr

iTrader: (5)

Thanks again for the valuable information Brad. 40 series will be on order shortly.

All is very well - trying to get my G where I want it. I got bored with the 18" wheels I had and got a set of the staggered coupe wheels for $200 from some incompetent individual locally I've sanded down all the rash and now they are being stripped and blasted, and will be coated Wheel Silver II sometime this week or next week.

Headlights will be getting tackled in the next few weeks to come - STi-R lenses, switchback signals, and LEDs for a projector shroud running light will be the move. Can't wait to start that.

Now only if TopSpeed will get their darn exhausts back in stock

blnewt

iTrader: (13)

Can't wait to see it all come together, killer deal on those wheels too!

ClickClackSmack

iTrader: (1)

Threw some 20mm spacers on the back. Getting the same for the front in a week or so. No rubbing at all in the rear

blnewt

iTrader: (13)

Pretty nice that you have coupe 19s as your winter set, way to keep things proper in the off-season

myg37s8u

iTrader: (1)

I jus did it and no probs I honestly love the look unless u want to go wit 370z rims but they look good

ClickClackSmack

iTrader: (1)

Yeah I always liked the look of coupe 19s on sedans. Was shopping for winter tires and came across a great deal so I had to snag them. I was going to get these powder coated in a gunmetal but I'm going to experiment with some copper(ish) plasti-dip to see if i like the look.

STownSaint

^the placement of those 19s in the wheel well is Perfect.

OB sedan on gunmetal coupe 19s looks AMAZING, there were some photos floating around on the site a while ago, KILLER combo