Q: Is a 20-inch wheel a good choice for a Model Y?

Twenty inches is a strong middle ground. It sharpens steering response and lateral support while keeping enough sidewall for stability and comfort on imperfect streets. The forged construction cuts rotating mass versus typical cast wheels, which helps the dampers stay in their ideal range for calmer control over bumps and more consistent braking. If you want more sidewall for rough roads, look at a 19; for a tauter look, a 21.