Need Wheel/Tire Advice
 

2002 C4 Cabriolet, with ROW M030.
Currently on 18" Carrera wheels with Pirelli P-Zero Rossos 225/40 front 285/30 rear.
Need advice re 19" HRE 542s:

a- What is the difference between 542 & 542R?
b- What tires should I get with those to maintain the overall tire diameter? (don't want to re-calibrate speedometer, also different diameter might mess up All Wheel Drive system)

TIA

Just saw this and thought you might be interested:

https://rennlist.com/forums/showthre...threadid=87445

As far as the wheel diameters, just check out some online tire calculators to find a size which has a similar ratio for front/rear diameters as stock wheels. As long as you keep the ratio the same, you'll be ok. ( Assuming you don't go crazy with the tire sizes.. :) )

Thanks Jeff, but Msindi's wheels won't fit a narrowbody.
Anybody have an idea of what size to get for a flush look?