[GH85Carrera]

No doubt smaller lighter wheels are a great advantage for rotating mass. My 85 came with 15 inch 7 & 8 inch Fuchs. They are light. The only issue is there is not quality performance tire that will handle rain on long drives. If you drive only in town on clear days and can avoid rain there are lots of sticky tires but they are scary deadly in rain or cold weather.

Since I drive my car on long road trips and I have driven in lots of rain, and in 16 degree mornings and 118 degree days I need tires that can handle all that and still perform as a modern tire can. I had to get some 17 inch wheels.

I can indeed tell there is a hit to acceleration speed. I can stop much faster as the traction is much higher, and the cornering is way higher then the best of the old tires I can find for 15s for rain and long drives.

I wish one manufacturer would make the 15s in a performance tire that can handle rain and long distance drives. I can't find that tire, so I went to the heavy 17s.