I have 16s too and only scratched them when I pulled in wrong. It's worth noting I have wheel covers/steel wheels.
Avant Garde M310 18x8.5 Satin Silver. Downforce USA Front Lip. Engine Cover w/ Sonic Blue Accents. KW V1 Coilovers. OEM Titanium Headlights. OEM Replica Spoiler. K&N Air Filter.