i have been going over the rules and it looks like i can change wheel sizes as long as they are "in the model range"
the model range for my car is found on page 19 of parade rules(a)Changes Within Model Range: Automobiles may be updated or backdated without effect on classification provided the specifications remain within the boundaries of the model range for the automobile.
that should mean that i can run a 18" wheel from those years but would the 2010 wheels be ok?Cayman/S/GTS...2013-2016
the 2014 Cayman did come with 18" wheels (8" F, 9" R) and that's what these are. they are "OEM" wheels and the same size as offered in 2014 but off a 2010 car.
here is the option list i found for the 2014 981. 395 and 396 are 18" wheels
https://www.stuttcars.com/technical/opt ... ayman-981/
would these wheels put me out of the showroom class or should i keep looking? they are a good price and available locally
https://sfbay.craigslist.org/sby/wto/d/ ... 55956.html
thanks for the help