[TinCan]

No - The stock tire is 26.1" tall the 245/35/19 tire is 25.8" in OD. The 275/30/19, 245/35/19 combo will do just fine on the stock rims. 235/35/19 is really too short at 25.5" in OD.

http://www.tirerack.com/tires/tires...ORTPS2XL&vehicleSearch=false&fromCompare1=yes

Lou

yeah but the width is smaller so the tire stretches out over the whole rim causing a tighter side wall.

 

[IZZY]

Ride Difference with Continentals

A little while ago I upsized to 245/35ZR19 fronts and 275/30ZR19 rears on the stock ISF rims (19x8 front and 19x9 rear). The tires I chose were Continental ExtremeContact DWS (DryWetSnow) tires. These are Ultra High Performance All Season tires with a Y speed rating (186 mph).

Overall, I am very happy with the tires. They have great dry grip for an all season tire, are very good in the rain, and actually not too bad in the snow.

I had to get an alignment after getting them mounted and balanced. This was because the tow angle in the front was off and was causing the car to be "floaty" at 80 mph+. The camber angles didn't need adjusting though.

Here are the best pics I could manage to show what the clearances are with the wider tires. I have experienced no rubbing whatsoever under extreme driving.

Did you notice any difference in the ride when you switched to the Continentals?

 

[Gymkata]

I didn't notice much of a difference in feel between the stock Bridgestones and the Continentals. After I had the toe angle adjusted, I still noticed a slight "floaty" feeling between 80 and 90 mph. I have been traveling a lot, so I haven't had the time to get it fixed. I'm pretty sure the problem is a bad balancing job. The kid who did it didn't know his head from his @$$. When I get the chance, I am going to have the Continentals road force balanced. I imagine this will fix the problem.

Overall, I am very happy with the Continentals. If you have just one tire all year round, and don't track the car, they are a great tire...especially if you ever have to drive in the rain. They will last much much longer than the stock tires as well.

 

[Gymkata]

A couple weeks ago I was washing my ISF and noticed (finally, I should have seen it a long time ago) that the kid at NTB had put my front wheels on the wrong sides. I went back into NTB and explained my situation to the manager, and he had his most experienced person rebalance the front wheels and put them on the correct side. Their machines can only calibrate balancing up to 60 or 70 mph, so road force balancing is what I will use in the future...and I will never use a shop like this again that isn't accustomed to working with high performance cars and low profile tires.

Anyway, I have had the opportunity since then to test out the car's feel at "Speed". 90% of that floaty feel is gone.

Anyway, the moral of the story is, don't be cheap like I was. Find a good shop when you have new tires put on your factory rims. 245s front and 275s rear work just fine, but make sure they put the correct rims back on all four corners of the car, and have them road force balanced if you ever plan on getting froggy with her.

 

[citylightva]

Road force balancing is the only way to go. My soft BBS rims all have some minor denting/bending (within spec), but they road force balance to well within specs and it tracks so true and settled...Gymkata, we actually have the exact same sizes, different cars for now of course...

 

[ISFnFast]

A couple weeks ago I was washing my ISF and noticed (finally, I should have seen it a long time ago) that the kid at NTB had put my front wheels on the wrong sides. I went back into NTB and explained my situation to the manager, and he had his most experienced person rebalance the front wheels and put them on the correct side. Their machines can only calibrate balancing up to 60 or 70 mph, so road force balancing is what I will use in the future...and I will never use a shop like this again that isn't accustomed to working with high performance cars and low profile tires.

Anyway, I have had the opportunity since then to test out the car's feel at "Speed". 90% of that floaty feel is gone.

Anyway, the moral of the story is, don't be cheap like I was. Find a good shop when you have new tires put on your factory rims. 245s front and 275s rear work just fine, but make sure they put the correct rims back on all four corners of the car, and have them road force balanced if you ever plan on getting froggy with her.

Gymkata,

Hopefully you got everything squared away and your car/tires are fine now.

So I'm about to get the same size tires on my stock rims for my 2008 IS F. It seems from reading this entire thread that an alignment or cambers and toe adjustments were not really necessary - is that right?
The only thing I should do is the road force balancing without the need to do any other adjustments. Can you or anyone else confirm?

Thanks!
ISFnFast

 

[lowrider]

^^^^I'm running a 285/30/19 - 245/35/19 tire combo on stock wheels. I have about 600 miles on my new Continentals, and have not noticed any uneven wear patterns. I did not align before installation.

Lou

 

[Gymkata]

My car is driving great after I had the front's rebalanced and put on the correct side. I have about 13,000 miles on the tires, and they are wearing well...The DWS is still showing boldly. With these tires, when you can only read DW in the tread, they are only rated for dry/wet. When only a D is visible, it is only rated for dry. I have no doubt I will get 30-40k on these tires.

 

[ISFnFast]

I just posted the below on the RE11 thread and copied into this thread with the addition of...
Be aware that the rears were difficult for the shop to install, so it took a bit more effort and time (for me an hour+).
__________________________________________________

All,

Thanks for all your help.
I just installed the RE11's on my stock rims. They look much BEEFIER, and much more square - both of which I'm sure will help in auto-x'ing...we'll see in a couple of weeks.

As for the alignment, the only stock adjustable things were the Toes (short of adding brackets or plates) so I got them back as close to stock specs as possible, thereby limiting one variable at a time to work on for auto-x'ing - tires - and of course driver skills.

Appreciate everyone's comments.

ISFnFast

 

[Silver88]

Just curious, if I go 245/35/19 and 275/30/19 Michelin PS2's on the stock rims, will it rub??
Thanks,

 

[lowrider]

Just curious, if I go 245/35/19 and 275/30/19 Michelin PS2's on the stock rims, will it rub??
Thanks,

Read my post above yours on the first page. I'm running 285/30/19 on stock wheels and not rubbing. Others are running 245/35/19 and 275/30/19 and are not rubbing. No, you will not rub!

Lou

 

[Silver88]

thanks, with the 245/35/19 and 275/30/19 set up, how much will the odometer be off?? Thanks,

 

[ennigmasoul]

I have my 245/35/19 and 275/30/19 Vredestein's Ultrac Sessanta's coming in this week. I'll keep y'all posted as I get the miles put in.

 

[Gymkata]

Those sizes will not rub.

 

[Gymkata]

I had to replace a front tire the other day when a brick that was at the edge of my driveway jumped out and perfectly punctured the sidewall of my passenger front tire. Since I only had about 50% tread left I decided to order new DWSs for both front wheels and keep the extra front tire as a spare.

This time I found a shop that could road force balance the tires, and I have to say "HUGE DIFFERENCE"!!! The car feels much more planted than it did before, and the road force balancing only cost me $9 a tire.

The rears are at about 50% now after 20k miles. Before next winter, I will likely replace them with 285/30R19 DWS tires, since several people here (lowrider & someone else) have said they are running the same size with no problems whatsoever.

 

[IS F Steve]

I have the DWS's in 285/30/19 with no issues at all.

 

[ashutoshvsingh]

I ordered Yoko advant sports in 245-40-19 front and 275-35-19 for the rear. I have question for Lou, who is running 285 in the rear, rear wheels are only 9.5 inches wide and the 285/30/19 tire is 11 inches wide, meaning the side wall of the tire is almost .75 inches off the rim on each side, so side of the tire must not be exactly sitting on the side of the rim? Just an observation? I would be curious as how the side walls would take it if you really tracked the car or took it on a curvy mountain ride for 4-5 miles long.

 

[IS F Steve]

I am in no way answering for Lou but I have that size and there is absolutely no signs of the tire being pinched whatsoever.

 

[lowrider]

I ordered Yoko advant sports in 245-40-19 front and 275-35-19 for the rear. I have question for Lou, who is running 285 in the rear, rear wheels are only 9.5 inches wide and the 285/30/19 tire is 11 inches wide, meaning the side wall of the tire is almost .75 inches off the rim on each side, so side of the tire must not be exactly sitting on the side of the rim? Just an observation? I would be curious as how the side walls would take it if you really tracked the car or took it on a curvy mountain ride for 4-5 miles long.

Rear wheels are in actuality only 9" wide. The cross section of a 285 tire is 11.5" (but note that is when fitted to a 10" wheel, when on a 9" wheel the cross section is reduced by .2" for each 1/2" less than 10") so on a 9" wheel the cross section is 11.1". The tread width of the DW tire is listed at 10.5". So we're talking about a tire that is almost square in measurement of sidewall and tread when mounted on a 9" wheel. I know it sounds like the tire should be pinched, and the entire tread tread area should not contact the ground, but it does not. The sidewalls are straight and the tread is flat. See picts attached.

As far as tracking the car, I have not, but I have driven aggressively and my F handles better than it did with my stockers. On another forum there is a pict of an F on stock wheels being tracked with a 305/30/19 rear tire. That tires looks pinched, but the driver apparently had no issues with the 305. I'm not recommended a 305 and I will go no wider than 285 on my stock rears, but only using that as an example.

The tires you ordered are are .7" larger in OD than the stock tires, They probably will work OK, But, IMHO they are too high and will not look right on an F. They will also affect your gearing and speedometer readings.

Lou