Car pulls

Check your tire pressures again, John. A car tends to drift toward the side having an underinflated front tire.

Also, check your front tires for uneven wear on the outside. A car will pull toward the tire having little tread left on the outside.

Barry

 

John- Reversing radials side to side will result in rapid wear, so swap them back asap. Take her to a good tire/alignment shop recommended by your tech and they should be able to find an out of round wheel or tire. If nothing, have the alignment checked front and rear. Since the Maranellos use eccentrics for camber adjustment, a really good shop recommended by your tech should have no trouble with the alignment.

 

are they both the same spec ?

i got a nail in one of my rear 305's pirelli corsas. could only find a "N" spec in that size but everything else was the same. car was flat out twitchy on hard acceleration and would pull to the right.

matching solved the problem

 

John- If you have NF2 or Hamann PGIII wheels, those 355/25 19s are all 2008 manufacture when Pirelli last used Novitec's molds to make them. There will not be any updated ones until there is more demand. You could contact Novitec in Germany and see what they plan to do about tires

I have the same tires on mine and will replace them with 255/35 19 (which I bet are your front tires, too) F and 345/30 19 R Michelin Super Sports, which are much better tires than the Pirellis. The rears are taller (27.2" vs 26.3" for OEM 305/30 19s), but not enough to compromise the ABS system. The Michelins have a 300 wear rating vs 160 for the P Zero Rossos and are also much less expensive at ~$1370 for a set of four. The P Zero Rosso rears are just about that much for two.

You are between a rock and a hard place right now, but in your boots, I would probably go for the Michelins.

 

Probably a broken belt in a tire. How do the front tires look? Any high spots when you put the car in the air and rotate the tires? Any warranty on them?

But when was the last time you had an alignment (just to cover all bases)?

Regards,
Jerry

 

I agree; separated or broken belt, especially if it happened all of a sudden.

 

John- No, the spacers are strictly for looks and a bit of extra track. You will probably have more room for taller tires without the spacers. The 355/25 19s are actually 25.99" in diameter, so a little smaller than OEM. They are a bit wider than the 345/30 19s, so fit should be no problem. More sidewall in the rear should actually look better, but you might consider lowering the rear to the correct ride height, since the 345/30 19s will increase ride height about 12 mm compared to 19" OEM tires.

 

John- 575Ms with Pirellis P Zero Rossos call for 32 psi all around and Michelin PS2s call for 29 psi all around. I would probably go for 32 all around. 29 sounds kind of low to me. Plus your TPMS system is set up for 32 psi, most likely. If you see excessive wear in the middle of the tread, back off the pressure a bit. If you are like me, you will wear out the outsides of the tires from cornering, so it should equalize at 32 psi.

 

+1 on what Taz says.

I too have NF2s (since spring 2012), the rears were close to done after 10,000km, and have switched from PZero to PSS.

 

John- Affirmative, that was dumb of me not to mention PSS. Thought I had. You should get much improved handling and braking with the PSS compared to the P Zero Rosso, which is a much older design.