Are 225/235s fine for yearly tracking?

[Rev_Night]

Hello!

I may have the opportunity to buy some nice Enkeis, but they are on the smaller size of 18x8.0 for all 4. Speaking with a rep at TireRack, he said the most I can run are 225/235/45s. I am only going to use this twice a year for HPDE/track, something I do with friends. I have a 2019 Stinger GT AWD.

Is there a huge performance difference between 225/235 and the 240-280s for track? Taking into account weight of tire, cost, tread life, potential wet driving, and my skillz aren't all that great either.

does 225 front 235 rear even make sense? At least with 225 I can rotate the tires

thanks peeps!

 

[vipeboy2000]

Since you've got awd, 225 front 235 rear will be too big of a diameter change..EDIT: (not that big of a change ... i calculated the one tire with 19 inch wheels) i'd just do 235/45r18 square ... i'd still do the square set with wider tires... no point in having that small of a staggered tire setup.

 

[Rev_Night]

ok, 235/45r18s it is! . Looking at some YOKOHAMA ADVAN APEX V601 at tirerack for $184/tire. I would love the Mich. pilot 4s or supers, but those are $250/tire. Not sure I will notice the difference in my heavy ass stinger

 

[JSolo]

I'm running 245/40/18 (as in my sig) on the OE 18x8.0 tires. Fits and looks fine. When tire shopping, rather than calculating diameter based on size, look at the mfg's spec for diameter or revs/mi to keep both axles either the same or within a small range of one another.

 

[RM7]

So you *can* run 245 on 8", but for tracking, this is the opposite config that you'd want, as the tire will tend to roll-over under hard cornering at the PSI for optimal traction. Skinny tire on really wide rim is the best for that, has the stiffest sidewalls. Fat tire on skinny rim is the opposite side.

If you aren't pushing the car to 10/10ths, 245 is probably a good size, but you are pretty limited with the Stinger for track traction, it's a fine line of getting something wide-enough that doesn't rub. Your optimal dry setup is probably more like 18x8.5 with a 235 section tire up front, making sure it's a super-sticky track tire. In the rear, probably 9x255.

I am running 8.5x255, but mainly for wet traction. I have a little higher cornering limit than the stock tires, but if I push it hard, I'll get the roll-over. Wet traction is basically the opposite of dry, you want sidewall flex for better wet-traction, so the fatter tire (relative to the rim) becomes a benefit. I'd say think hard about this though, because dry roll-over is definitely a thing, I went 10mm over stock on my front tires on my 1LE because OEM cars (mostly BMWs) were scooping up all the OEM sizes that I needed, which brings mine out to 295, but they roll over more in hard cornering, costing me traction and time.

I found the stock 225 tires pretty pathetic and insufficient for a car of this size. I could easily over-power them with the brakes, as in lock the brakes without slowing down due to lack of traction. Hard braking tends to happen a lot in track too. 255 helped a lot with this.

 

[Rev_Night]

I'm running 245/40/18 (as in my sig) on the OE 18x8.0 tires. Fits and looks fine. When tire shopping, rather than calculating diameter based on size, look at the mfg's spec for diameter or revs/mi to keep both axles either the same or within a small range of one another.

Do you do any tracking with that 245/40/18 setup?

I'm getting conflicting information. I just talked with a GetYourWheelsRep and he said these rims could track 245/35 just fine. TireRack said no to 245s, only 235/45.

Maybe I could find a tire I like and then contact the manufactures individually

 

[JSolo]

^^I have not. I do corner fairly aggressively when the roads permit. I think if this will be your daily tire too, you should weigh all factors. As for tire roll issues, maybe i'm just not pushing it hard enough. Track/HPDE's is more controlled than street driving, so you can push harder. Ultimately, 10mm (width of one's index finger) isn't that much of a difference.

 

[Rev_Night]

These are for the track only. I have all seasonals for my daily

 

[RM7]

Do you do any tracking with that 245/40/18 setup?

I'm getting conflicting information. I just talked with a GetYourWheelsRep and he said these rims could track 245/35 just fine. TireRack said no to 245s, only 235/45.

Maybe I could find a tire I like and then contact the manufactures individually

Tire Rack sells wheels and tires to 99.9% of people who are not looking to track cars and most of the time just looking for some flashy wheels.

The best way to know whether a tire will fit a rim is consult the TIRE manufacturer. Their website will usually tell you. This can be different than the normally accepted ranges, which normally go +-20mm in either direction, but there are some isolated cases where the manufacturer says it's perfectly fine. I believe Michelin is one of those when you are looking at 245 and 8" rims. One reason is one manufacturers tires may be "narrower" for a given size than another's. Whether it fits on the car is always another question, but then you are looking at clearance inside the well, you can measure that yourself, do you have 10 or 20mm more at full lock left and right? Offset comes into this too, you could be sucking your wheels in closer if you don't get the right offset. Point is, if you know what you are doing, you may come to a different conclusion than TR. You may still fail to take everything into account and get screwed, but the chances of that are much less if you know what you are doing and research thoroughly. My summer setup of 18 8.5x255 worked well. TR didn't have an issue selling the setup to me, but it was not a "known configuration" for this car.

 

[Rev_Night]

Yeah so I consulted Yohokama, just called them up, and they said talk to a dealer. TR techinically is a dealer. I'll call a local tire shop i guess. See what they say

 

[RM7]

Yeah so I consulted Yohokama, just called them up, and they said talk to a dealer. TR techinically is a dealer. I'll call a local tire shop i guess. See what they say

ADVAN NEOVA® AD08R

When the road or track calls for an extreme performance summer tire, the ADVAN Neova AD08R answers with world-class technology that delivers fistfuls of grip for unprecedented and consistent performance.

www.yokohamatire.com

They are saying 7.5-9 for a 245, although they say "approx", it seems like 245 and 8 would work according to them.

 

[Rev_Night]

hmmm fascinating. I just got off the phone with a local performance shop and they said to stay away from the 245s with a 8.0 rim bc the tire could roll, akin to what you said.

Yet if this tire manufacture said that their tire can work just fine with that rim, then we should be fine right?





Edit: wait nvm, he also said that since it was AWD, the overall diameter had to be the same too. So stock is 25.9. The 235/40 is .5 under (25.4), the 235/45 is .5 over (26.4). The 245/45 i list above is 26.7, .8 over. That may be too much.

 

[vipeboy2000]

hmmm fascinating. I just got off the phone with a local performance shop and they said to stay away from the 245s with a 8.0 rim bc the tire could roll, akin to what you said.

Yet if this tire manufacture said that their tire can work just fine with that rim, then we should be fine right?


View attachment 66045


Edit: wait nvm, he also said that since it was AWD, the overall diameter had to be the same too. So stock is 25.9. The 235/40 is .5 under (25.4), the 235/45 is .5 over (26.4). The 245/45 i list above is 26.7, .8 over. That may be too much.

If you do the same for rear it won't matter. You just want the front and rear diameter within 1% generally

 

[Rev_Night]

If stock is 25.9, 1% is .259. so thats 25.641-26.159.

This means that the .5 is pushing it, so def the .8 of 26.7 (3%) would too

 

[Ohiocruiser]

245/40 is slightly smaller than 225/45. So theoretically you should get slightly better acceleration and braking. But than again, if you talking about strictly tracking the car, and pushing it to the limits, maybe the wheels themselves are not strong enough. How hard are you pushing it??

 

[RM7]

hmmm fascinating. I just got off the phone with a local performance shop and they said to stay away from the 245s with a 8.0 rim bc the tire could roll, akin to what you said.

Yet if this tire manufacture said that their tire can work just fine with that rim, then we should be fine right?


View attachment 66045


Edit: wait nvm, he also said that since it was AWD, the overall diameter had to be the same too. So stock is 25.9. The 235/40 is .5 under (25.4), the 235/45 is .5 over (26.4). The 245/45 i list above is 26.7, .8 over. That may be too much.

Well, but you said for tracking, so a super high performance 235 is probably a better idea for the front, to prevent the roll-over.

 

[RM7]

245/40 is slightly smaller than 225/45. So theoretically you should get slightly better acceleration and braking. But than again, if you talking about strictly tracking the car, and pushing it to the limits, maybe the wheels themselves are not strong enough. How hard are you pushing it??

Yup, this would be better, with stiffer sidewalls.

 

[Rev_Night]

whats a super high performance tire? Michelin PS4? 4S? R Compound?

Yup, this would be better, with stiffer sidewalls.

So find wheels that are 8.5-9" ?

 

[Ohiocruiser]

I would think, for the track, you want the widest rim you could fit there. Even though i am selling those rims, i don't want you to get something you dont need. Maybe someone with track experience can comment on that.

 

[Rev_Night]

I would think, for the track, you want the widest rim you could fit there. Even though i am selling those rims, i don't want you to get something you dont need. Maybe someone with track experience can comment on that.

i appreciate the honesty, rare in the world of the internet.

I spoke with the local high performance shop and they said that I could get 245/40R18 97Y just fine on the 8.0 rims. Squared obviously. These sound alot better for track than the 225s and 235s. I know that ideally 18x9.5@255 is the best, but that means buying new enkei rims at that size, and these f*****s are like $250-$350 per rim. I highly doubt im going to notice the difference between 245s and 255s.

as soon as you send me the pics i'll send you the $$ tonight or early tomorrow