Need Help with handling issue with new tires...

psoff · Jun 27, 2016

Aarron_M said:
The difference between all-seasons and summer tires. Sidewall flex, grip, handling.

Did you replace with the same exact size tire?

You didn't expect an all season to handle turns the same as a dedicated summer tire, right?

They are the same exact tire size 275-40-19. I didn't expect them to be the same as Summer only tires. But I did expect the car to go straight.
This isn't a cornering issue.
Let me describe the issue another way...
While going straight on the Express way at say 60mph on a flat surface. I take my hands off the steering wheel,...car stays streight...then floor the gas peddle quickly... the car lurches/takes off to the right. Then when I let off the throttle quickly the car quickly goes back to the left. It is not a subtle motion at all there is a lot of movement.

Aarron_M · Jun 27, 2016

That sounds exactly like sidewall flex. In the meantime, I'd not let go of the wheel when accelerating or decelerating...lol. A 40-series all season will have quite a bit more flex in it. You're gonna have to "learn" how the car behaves now and adjust, or get a different set of tires.

Coaster · Jun 27, 2016

If you are running mismatched tires the ones with less grip should be in the front. You've put the tires with less grip in the back.

This is the same reason and decent shop will not let someone with a FWD car just replace the front tires and leave the old backs. When you start braking hard you do not want the back losing traction first, it will try to pass the front of the car and that is bad.

Norm Peterson · Jun 27, 2016

Need4SpeedMotors said:
To me it seems to be the tires.

Agreed, and the observations by OP going to the Continentals and away from them by Martman are consistent with each other.

Martman should re-accustom himself to the new behavior within a couple of weeks - he's just steering the car too much for the better-responding Pirellis, having to correct (but overcorrecting) and then having to correct that. And so on.

Norm

Niz55 · Jun 27, 2016

SWETRID said:
Continental DWS have a much softer sidewall then the P-Zero summer tire so it could feel different/lazy compared to Pirelli.

This. The side walls are a joke on the conties. P zeros have much stiffer sidewalls.

Quackfoo · Jun 27, 2016

Honestly there's a real reason you shouldn't be mounting different tires front and back, it's not something made up. You're front tires are doing one thing and your rears are doing something else. I would have been surprised if it there wasn't an issue

psoff · Jun 27, 2016

Well I took it into the shop today. I took the tech for a test ride and he quickly noticed what I was talking about while he was in the passenger seat. He checked the Alignment and everything was in spec. So they had nothing else to say to me but that I should take it into the dealer. Well I want to rule out that it for sure is or is not the tires before I take it anywhere else. So Since the Continentals have a 60 day free trial, I told them I dont want the tires and had them order me the Michelin Pilot Sport AS3. It will cost me $80 more. BUT if they put these ones on and it does the same thing, then I know 100% for sure it is mechanical and I will look over everything and check all the bushing bolts. If i see nothing I will then take it to the dealer.

hiccup · Jun 27, 2016

My pzeros have not really let me down yet. Is it the wet or snow or something?..They grip very well still with 5,200 mi. Now if I can only find a sweet deal on another set .

Kuba · Jun 27, 2016

psoff said:
Well I took it into the shop today. I took the tech for a test ride and he quickly noticed what I was talking about while he was in the passenger seat. He checked the Alignment and everything was in spec. So they had nothing else to say to me but that I should take it into the dealer. Well I want to rule out that it for sure is or is not the tires before I take it anywhere else. So Since the Continentals have a 60 day free trial, I told them I dont want the tires and had them order me the Michelin Pilot Sport AS3. It will cost me $80 more. BUT if they put these ones on and it does the same thing, then I know 100% for sure it is mechanical and I will look over everything and check all the bushing bolts. If i see nothing I will then take it to the dealer.

That's a safe bet :thumbsup:

Built4Speed · Jun 27, 2016

There have been many on this board that have positive things to say about these continental tires. I'm considering them myself once I switch out my factory wheels.

kz · Jun 28, 2016

Continental DWS is about the best all season that exists. It seriously is very very good even in snow. Having said that, it is still all season (why would somebody put all season on a perfomance car boggles my mind but that's a different issue) - it is a softer compound than P-Zero, different tread pattern, different side wall stiffness. Distorts car dynamics IMO.

Ditch the all seasons, buy winter tires for winter.

jasonstang · Jun 28, 2016

The DWS is on the soft side when I had it on the BMW.

Slow_5OHH · Jun 28, 2016

I have the exact same problem with mine. Switched from P-Zero's to Conti's in back and still running the stock P-Zero's in the front. Immediately noticed a difference in the handling of the car. At first I checked the tire pressure and it was set to around 26 psi so I set it to 32 psi which did help but there is still noticeable movement from the rear that wasn't there before. Car is stock height with no suspension upgrades. May be best to switch fronts to Conti's to see if problem goes away? Side note: I went with 285/35 instead of 275/40

kz · Jun 28, 2016

Slow_5OHH said:
May be best to switch fronts to Conti's to see if problem goes away?

That's what I would do.... Run 4 same tires on each corner.

Quackfoo · Jun 28, 2016

jasonstang said:
The DWS is on the soft side when I had it on the BMW.

The newer dws 06 is quite a bit stiffer than the old dws. Not as stiff as a summer tire still but definitely better.

Need Help with handling issue with new tires...

psoff

Well-Known Member

Aarron_M

Well-Known Member

Coaster

RallyNorthAmerica.com

Norm Peterson

corner barstool sitter

Niz55

Well-Known Member

Quackfoo

Well-Known Member

psoff

Well-Known Member

hiccup

Well-Known Member

Kuba

Well-Known Member

Built4Speed

Well-Known Member

kz

Well-Known Member

jasonstang

Well-Known Member

Slow_5OHH

New Member

kz

Well-Known Member

Quackfoo

Well-Known Member