Tire Question & Recommendations

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Old Nov 13, 2011 | 03:55 PM
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From: CHICAGO
Tire Question & Recommendations

My G is lowered on Eibach's with 20mm spacers.

Stock wheels are 18x8 with 225/50 Dunlop Tires.
Summer wheels are 19x8.5 with Hankook Ventus 245/50 Tires (G/Z guy's swear by them).

While cornering, the stock tires feel more stable to the ground and less body roll while the summer ones look nice but the car feels more loopy and less stable.

Is it because of the sidewall that causes this feeling? What are some summer tire recommendations with a stronger sidewall to reduce the body roll?

Thanks
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Old Nov 13, 2011 | 09:28 PM
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From: Appleton WI
Originally Posted by UNCTYPE-S
My G is lowered on Eibach's with 20mm spacers.

Stock wheels are 18x8 with 225/50 Dunlop Tires.
Summer wheels are 19x8.5 with Hankook Ventus 245/50 Tires (G/Z guy's swear by them).

While cornering, the stock tires feel more stable to the ground and less body roll while the summer ones look nice but the car feels more loopy and less stable.

Is it because of the sidewall that causes this feeling? What are some summer tire recommendations with a stronger sidewall to reduce the body roll?

Thanks
well for one, if you posted the correct tire sizes your running a tire that is roughly 1 inch larger overall dia. 26.9" vs 27.7" The added sidewall may be part of what you are feeling. What Ventus are you running?
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Old Nov 13, 2011 | 09:34 PM
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Sorry, Hankook Ventus V12 Evo.
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Old Nov 15, 2011 | 08:01 PM
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From: CHICAGO
Help!
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Old Nov 15, 2011 | 09:56 PM
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Post pics of both set up?

Are you confident that your feelings are correct?
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Old Nov 15, 2011 | 09:59 PM
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Why would you need pics to answer my question? Just curious.

I am confident, but a confirmation is not a bad idea. LOL
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Old Nov 15, 2011 | 10:02 PM
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Oh, just wanted to see the sizes of the sidewalls. Can't really picture it in the head. So, can't help you out at all in this case.

Don't your 19s with your tires have thinner sidewalls??
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Old Nov 15, 2011 | 10:21 PM
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I'm pretty sure it's the actual kind of tire rather than the size of the wheel (18 vs 19") but I could be wrong?

Stock: 225/50/18
Aftermarket: 245/40/19
It's very conservative as you can see. I just don't understand the body roll difference and if it's because I need a stiffer sidewall, then I am looking for tire recommendations for the spring.



Last edited by UNCTYPE-S; Nov 15, 2011 at 10:25 PM.
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Old Nov 16, 2011 | 03:11 AM
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Not sure what you mean by "loopy" but I have the same tires (Hankook Ventus V12) and I absolutely love them. Yes, the sidewalls do sometimes feel a little soft. That's why I put about 4-5 psi more than normal... to stiffen them up a bit.

In your first post, you list the Hankook tire size as 245/50 but above you say they're 245/40. Which is the correct one?

If it's 245/50/19 and stock tire size is 225/50/18, the Hankooks are 28.64" in diameter vs 26.85" stock. That's a 6.25% diameter difference. This difference makes your Hankook sidewalls taller (4.82") compared to stock (4.42") and, combined with their already somewhat soft sidewall, would explain the softer and less stable ride you're feeling.

How many psi's are you running the tires at? I have mine (225/45/18) at 38-40 psi. Maybe try running yours at a slightly higher psi to see if that helps.
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Old Nov 16, 2011 | 08:35 AM
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I guess when I meant loopy, I was a bit of that at the time. Haha. I was just referring to the body roll and how it felt loose when making turngs. I have AWD and sometimes when I make an aggressive turn with the stockies, I feel planted...the Hankooks I feel like I'm going to fall off the cliff.

I think the PSI was around 35 so maybe increasing will do the trick.

It's 245/40/19, I made a typo in the first post and couldn't edit.
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Old Nov 16, 2011 | 08:40 AM
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Not every tire is the same. My Nitto Invos had a softer sidewall, but they performed great. Try bumping up the psi. I ran about 42 with them because of the softer sidewall. It firmed them up, and there was no uneven wear.
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Old Nov 16, 2011 | 12:08 PM
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Originally Posted by fsttyms1
Not every tire is the same. My Nitto Invos had a softer sidewall, but they performed great. Try bumping up the psi. I ran about 42 with them because of the softer sidewall. It firmed them up, and there was no uneven wear.
Damn....that's high.
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Old Nov 16, 2011 | 01:28 PM
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Car and Driver reviewer also felt the Hankooks were a little soft. But he's right, they are "deceptively quick."


“Deceptively quick” is a good summation of the Hankook Ventus V12 Evos because they often didn’t feel as strong as they actually were, particularly in the dry. Their fourth-place autocross time wasn’t spectacular, but they did outlap the benchmark Michelin PS2s. Geswein said the Hankooks felt “somewhat soft” and “imprecise,” although they were forgiving, yielding consistent laps with no surprises. Despite that feeling of softness, the V12 Evos somehow managed a second-place skidpad run of 0.93 g and were above average in braking. Hankook just launched a new extreme-performance Ventus R-S3 model, which wasn’t available in time for this test but likely has sharper dry responses.

In the wet, however, the V12s were as sporty and connected as they come, with grip second only to the PS2s’ and the best braking. The Hankooks were extremely consistent, likely because they were so well-behaved, which made them easy to drive quickly. Subjectively, they felt the best around the track, even though their time trailed slightly behind the Dunlops’.

With above-average wet and dry performances, and tying for quietest on the street loop, the V12 Evo is an impressive and well-rounded summer tire. And, at $106, it’s a bargain, too.
I think bumping up the psi will fix the problem. At least it did for me.
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Old Nov 16, 2011 | 03:48 PM
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Originally Posted by AZuser
Car and Driver reviewer also felt the Hankooks were a little soft. But he's right, they are "deceptively quick."




I think bumping up the psi will fix the problem. At least it did for me.
That's funny because not only does the driver feel the same as I do, but my stock Dunlops feel better (look at the last line of second paragraph).
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Old Nov 16, 2011 | 03:49 PM
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From: Appleton WI
Originally Posted by RaviNJCLs
Damn....that's high.
I typically run 38 to 40 in most my tires. Its not that bad. Now if im out auto-x'ing then ill drop them to about 30 to start. By time i get heat in them they are up around the 38-40 range.
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