From a pure handling point of view a lot of track day warriors still seem to prefer 18s or 19s over 20s on their 911s and Caymans. But a lot depends on actual tyre availability for any specific vehicle. For example you may happen to have a better choice of performance tyres in 19" size, that would easily trump any theoretical gains/losses from running 18s or 20s.Pete wrote: ↑Tue Jul 18, 2017 1:58 pm I have no motorsport experience at all, but I'd agree with the assessment that big rims are largely a cosmetic thing. I've been more than happy with my 18s and not fretting about them being kerbed. I guess there might be handling characteristics of having less lateral flex at the expense of greater lateral wear.
I just have to put up with comments that I should have chosen larger rims or comments like "bigger rims would fill those arches".
The Macan is running a larger overall tyre circumference than a 911 (I presume), so not so low profile for a given rim size. For me, the ride comfort and kerb practicality of a smaller rim far outweigh any marginal handling gain (which may or may not exist). The only negative I've read about 18s on the Macan is too much of a floaty feeling over undulations, which I'll get to test pretty thoroughly on our local roads. If that turns out to be a real issue then I'm sure 19s will be fine.
