I've read all through this thread, excellent information shared. I'm new to this world trying to learn, so any advice appreciated. My van is a 6.1 DSG 2WD SWB T32 with standard suspension and standard 215/60/R17 wheel and tyre setup. I also have direct TPMS.
I'm trying to decide between two different 18X8.5 wheels, one with ET40, the other ET35. I want to fit BF Goodrich KO2 255/55/R18s which gives me -6.49% speedo reading. But 235/55/R18 General Grabber AT3s change my speedo by only -3.62%. I'm also considering Cooper Discoverer ATT 235/55/R18.
All of these choices seem to give me correct load ratings. I'm not to bothered about the speedo change perhaps, its more any effect on gearing, and what issues that may cause with a DSG specifically maybe. So my question really, is -6.49% too much? + any other issues I may get with 255/55/R18s?