[masraum]

Originally Posted by GH85Carrera

Absolutely. My 911 came with 15 inch Fuchs. I loved the wheels when decent rubber was available. Now the 15 inch tire size is either a mini van all season tire, or a autocross track tire that is super scary in the rain or below 32 degrees.

I drive my 911 on long road trips, and we are going on a fall foliage trip soon. Last year one morning it was 16 degrees.

I have 17 inch Euromeisters now and Michelin PS2 tires. They have a grip level that is orders of magnitude higher than anything I even had in 15 inch tires. The are great in the rain, and do just fine at 16 degrees. They cost a lot more than the 15 inch tires ever did, but man they stick me to the road.

Of course going from 185s front and 215 rear to 225 front and 255 in the rear is a big part of it.

Yep, the width helps, but the main factor is the modern UHP tire compounds and construction. Assuming similar tire pressures, you should have the same size contact patch as you did, only a different shape now.