Someone please explain this to me.

[jhandy]

I just put two new tires on the rear of the car. They are Pzero Asemetico 275/35/18. On the front I have PS2 pilot sport.

I did not put PS2 on the rear because they were on back order, and the front tires are faily new, I will soon replace them with Pzeros as well but for now I left them.

I found that the Pzero tires are very slipperly. From a dead start the tires will spin and smoke, and on turns I feal like I am on Toyko Drift.

I have heard that mixing tires front and back affect the grip, but my question is....

Why would the front tires have any effect on the grip of the rears?

Has anyone else been dissatisfied with these tires?
Thanks,
James

[Gary in BR]

For them to be slippery from a dead stop I would assume there is a tire issue.

From my experiences i had the ps cuos on my car and took them off for toyos and the car felt like it was on ice all the time. I went back to ps cups a few months ago and feel planted again, my point is the ps cups may be so good the others feel bad.

Please someone who actully knows the answer chime in I am interested in the answer also.

[blinkwatt]

Isn't there a break-in period for new tires?

[rick3000]

This just my theory:
Since the front and back have different threads, and possibly different rubber stickiness. If the front set or rear set is catching and turning before the other set then that may be causing the slipping and sliding your describing.

[roadracer311]

I don't think the front is affecting the rear traction. I agree with the comment, that it might be taking a while to scrub in your new tires.

I used to race motorcycles and spent a good chunk of a season running Dunlops on the front and Michelins on the back. I'd have no problem mixing brands as long as they are both about as sticky.

Tires should scrub-in in less than 500 miles. Probably as little as 200. The owners manual says about 200 miles IIRC.

Could be as simples as tire pressures. Maybe they even mounted them on the wrong side of the car.

How cold is it where you are now. Our tires don't have much grip below 40-45 degrees either.

[racer_d]

Originally Posted by jhandy

Why would the front tires have any effect on the grip of the rears?

They don't directly impact the performance of the rears. However, since they are made by 2 different manufacturers the tires will have different consistencies.

If you put race slicks on the front and skinny snow tires on the rear, you would expect the handling to be in-consistant front to rear due to the differences in available grip.

Tire composition (1 ply, 2 ply, 3 ply, nylon belts, steel belts, rayon belts etc) as well as the rubber all impact grip. As does tread pattern.As does temperature. As does, to an extent treadwear rating (itself a tricky, inconsistant rating that generally is accurate for "all season" type tires, but can be manipulated by a manuffacturer - ie some "R" comp tires have been "mis labeled" in this catagory.)

So.. By not getting a matched brand/style on the car, you are experiencing some performance differences. It took me a bit to notice the performance differences between the BFG KDWs the previous owner put on the rears vs the Khumo Ecstas he had on the front.

I would allow a couple hundred miles of "scrub in" to see if it gets better.. but it may not.