About to replace my tires, thinking about 275 rears and 235 fronts.

What are you guys running??

 

245 front 275 rears

 

I run stock size up front, but 285x30 in the rear.

Coyote

 

I have a set of 245's just sitting in the shop that I have yet to put on the front.
I am not sure if there really is any need for that size tire up front.
Quite sure I should have stayed with 225's.
Any way,
225's front
275's rear.

 

oem ps2's. perfect year round tire here in central cal.

 

OEM sizes for a set of Dunlop SP Sport Maxx TT going on this week. They are replacing the OEM Conti all season tires that were on the car when I bought it.

In my (very) brief experience with the all season tires, they are horrible if you are interested in performance. Rear tires spin way too easily and front tires don't grip well enough in turns. I'm not surprised by any of this but just wanted to point out that you'll likely be much happier with a sticky performance tire on a car with this much power.

I should mention...I'm interested in overall handling dynamics and balance rather than drag racing or off the line grip. I'm sticking with the OEM tire sizes as I figure quite a bit of thought from the guys at SRT went into the suspension setup of the SRT-6 and they settled on these parts as the best compromise for the suspension system as a whole. It's not like this is the family Civic, it's received a lot of attention from pro's before it was offered for sale.

 

You wouldn't happen to have any pics of the car looking at it from the rear with the 285 tire?? Did you have any issues fitting them??

I already have 15mm spacers, would 285 rears be overkill??

 

I have a Limited, but the wheel size is the same on both models.

I ran a 285/30 for about ten months on my OEM wheels, with no issues and a nice mean stance. If you're at stock height, you should have no issues. Mine was lowered roughly 2" in the rear and I had maybe 1/2" clearance between the fender lip and the edge of the sidewall. 15mm spacer would have definitely cause me some rubbing under suspension articulation.

I'm still running the 285s, on a wider wheel and the same drop, w/o issues.

Pics in my gallery

 

How do you like this setup Mike. Sorry at all about not going the 235 front/285 year at all? I keep tossing back and forth about that. i think the stocks look fine up front, and if I do the 285 in the rear it may look fat a$$, So if I beef up the fronts then it may be ok. So I keep flipping on the 285's in the rear vs the 275's

 

It seems that going to 235/40R18 up front is a popular upgrade from OEM. If so, the best mathematical match to maintain the classic staggered Crossfire look is 275/35R19.

A lot of folks look at the 285/30R19 in the rear to go as wide as possible, but again, they might appear just a bit too short for the staggered look (about an inch too short, actually), and are really a stretch to mount on OEM rims.

To each his own, but for me it's 235/40R18 and 275/35R19. Chubby as can be, safe and staggered just right.

 

Thanks kane, I think you're right on the 275's.

 

Of course just to confuse matters, there's always the 285/35R19 in back, but then I think you're getting too tall to maintain the classic stagger.

So yeah, 275 it is.

 

Sorry, don't have a picture at the moment, but I can take on later today
and post it up. No problems in fitting them I watched as the tire shop
guys installed them, and it didn't seem to present them with any problems.

Now, with your 15mm spacers, I don't know. Maybe you could remove
them, as you are adding 300mm by going with the 285 size over the stock
255 size. That will be split on either side of the rim, so the tire should not
stick out any further than what you've accomplished with the spacers.

Coyote

 

I would have to disagree that the 285/30ZR19 affects the "staggered" look. In fact, it is much closer to the wheel height of the 255/35ZR19s that come
stock than are the 275/35ZR19 tires.

Coyote

 

Not only that, but you affect the trueness of the speedometer much more
with the 285/35ZR19 than you do with the 285/30ZR19 tires. The
285/30ZR19 is off by about 1/2 mph at 60 mph.

Coyote

 

The diff Coyote is the sidewall height to balance the two. The 285-35 and the 235's almost match, the 285-30 wall is too thin or my taste, vs the 40's up front. Too much diff, so that's why I was flip floppin on the 285/35 in rear. But after thinking about it, the 275's would fill the well a tad better, yet have a margin of safety on the 9 in rim. If you get 9.5 rims then the 285's would be just fine.

 

OK, so I just ran out to the garage and using my Stanley tape measure,
I looked at the sidewall height for the 225x40ZR18 fronts and the
285x30ZR19 rears. Sidewall height on both was right at 2 1/2 inches.
Not sure you'll get a better match than that, but personal preferences will
differ between you and I, I suspect.

Remember that the sidewall height is in porportion (a ratio) to the width
of the tire.

Coyote

 

not sure where you're getting the numbers on height coyote.

18x8.5 ET 3519x9 ET 22BackSpace155 mm (6.1'')149 mm (5.8'')
7 mm (0.3'') shorter.Rim Lip19 mm (0.7'') widerTypical Weight~ 28 lbs / 13 kg~ 33 lbs / 15 kgTires:Tire 1Tire 2Tire size225/40-18285/30-19Section width225 mm (8.9'')285 mm (11.2'')Sidewall90 mm (3.5'')86 mm (3.4'')Tire diameter637 mm (25.1'')655 mm (25.8'')
18 mm (2.8%) taller.Rim sizes18x6.5 to 18x8.519x9 to 19x10.5Circumference2000 mm (78.7'')2057 mm (81'')Revs per mile804.6782.5SpeedometerAssuming that this is OEM tire and speedometer readings are correct When speedometer reads 60mph (96.6km/h) actual speed will be 61.7mph (99.3km/h): 2.8% faster.Typical Weight~ 21 lbs / 10 kg~ 25 lbs / 11 kgWheel+Tire Weight~ 49 lbs / 23 kg~ 58 lbs / 26 kgClearance:Package 1Package 2SuspensionAssuming that this is OEM wheel/tire and there is no any problems with clearance on both sides Package is 17 mm (0.7'') closer to suspension/brakes components. Make sure that you have enough room for that. If not, consider lower offset, narrower tires or using spacers. FendersPackage will stick out 43 mm (1.7'') farther. Make sure that you have enough room under the fender. If not, consider narrower tires or higher offset. Wheelwells

But you're right about where they're almost the same size in height

here's the specs on 235/40's front, 275/35's rear

Wheel 1Wheel 2Wheel size18x8.5 ET 3519x9 ET 22BackSpace155 mm (6.1'')149 mm (5.8'')
7 mm (0.3'') shorter.Rim Lip19 mm (0.7'') widerTypical Weight~ 28 lbs / 13 kg~ 33 lbs / 15 kgTires:Tire 1Tire 2Tire size235/40-18275/35-19Section width235 mm (9.3'')275 mm (10.8'')Sidewall94 mm (3.7'')96 mm (3.8'')Tire diameter645 mm (25.4'')675 mm (26.6'')
30 mm (4.7%) taller.Rim sizes18x7 to 18x919x8.5 to 19x10.5Circumference2025 mm (79.7'')2120 mm (83.5'')Revs per mile794.6759.3SpeedometerAssuming that this is OEM tire and speedometer readings are correct When speedometer reads 60mph (96.6km/h) actual speed will be 62.8mph (101.1km/h): 4.7% faster.Typical Weight~ 22 lbs / 10 kg~ 26 lbs / 12 kgWheel+Tire Weight~ 50 lbs / 23 kg~ 59 lbs / 27 kgClearance:Package 1Package 2SuspensionAssuming that this is OEM wheel/tire and there is no any problems with clearance on both sides Package is 7 mm (0.3'') closer to suspension/brakes components. Acceptable for most cars. FendersPackage will stick out 33 mm (1.3'') farther. Make sure that you have enough room under the fender. If not, consider narrower tires or higher offset. WheelwellsWill fill out the wheelwell by extra 15 mm. Make sure that you have enough room under the fender. If not, consider lower profiles or smaller rims.
Will fill out the wheelwell by extra 9 mm. Acceptable for most cars

 

Forget about side wall height. Look at overall diameter of the tire. Because again, we're trying to keep the classic stagger from front to back when using the fatter 235/40R18 up front, looking for tires to fill the wheel well proportionately. Don't forget that this whole conversation revolves around using the 235 up front.

The heights of the OEM 225/40R18 and 255/35R19 are 25" and 26" respectively.

The heights of the 235/40R18 and 275/35/R19 are 25.4" and 26.6" respectively. Both tires are taller in roughly the same proportion as the OEM stagger. In my opinion, this is what matters.

A 285/30R19 will look too short (25.8") and a 285/35R19 will look too tall (26.9") with respect to the 235 up front.

Color me gone.

 

Kane is correct on this for the overall balance and look. Not too fat in the rear, with skinnier upfronts. plus the 275's will be a better fit on the stock rims.