[Hope this is the right forum for this. Apologies if there's an existing thread about it.] Feedback wanted: I have a Model 3 Performance with Performance Upgrade option probably due within a couple weeks. I plan to replace the stock 20 inch wheels and tires with 18 inch racing wheels, Enkei RPF1 in 18x8.5x40mm, and Michelin Pilot Sport 4S 235/45-18 tires. (These are essentially stock Aero 18 inch sizes, but with a lighter wheel and the same tire as the Performance Upgrade in a higher profile.) Goal is to reduce wheel and tire weight to increase performance. (The wheel may be large enough in inner diameter to fit the Performance Upgrade brakes. I'm checking with Tire Rack about it now. See also my measurements at: That $5k Performance Upgrade option, Part Deux ) (All factory Model 3 tires are 235mm nominal width, which is a bit narrow for the Performance version, but would aid lower drag and longer range by a few percent.) This is for street use and matches the width compromise between grip and range that the factory wheel and tires have, but with a much lighter wheel than the factory 20. It would be the same excellent tire as the factory 20s, but in a higher profile and therefore taller sidewall. My question to the group is: How much (if any) of the excellent handling / responsiveness of the car might I lose by going with the taller sidewall? I expect acceleration, braking and bump control to be much better due to the significantly lighter wheel and tire combination compared to the factory 20 inch wheel, which is at least 10 pounds heavier. Would be particularly interested in the thoughts of the professionals @Mad Hungarian and @MountainPass . For track use I would probably get a separate set of 265 or 275 near racing tires on 9.5 or 10 inch wide wheels respectively, per Sasha, on 18 inch wheels if I can find them, or on 19s if not.. Interestingly both tire and wheel choices get somewhat limited 275 for soft compound tires. Toyo Proxes R888 soft compound DOT legal racing tire is available in 275/45-18 for example. 265/35-19 seems to have the widest competition tire availability.