Tire Rack (https://www.tirerack.com/tires/Sele...Model+Y+Long+Range&autoYear=2020&autoModClar=) has started including Model Y on they website. I wanted to see what the difference in the Model 3 18" and Model Y 19" in respect to sidewall. The Model 3 is a 235/45R18 whereas the Model Y is a 255/45R19. This makes the TM3 Sidewall 4.2" and the TMY Sidewall 4.5". Here's a complete comparison....
TM3 18" vs TMY 19"
Diameter 26.3" vs 28.0"
Width 9.3" vs 10.0"
Sidewall 4.2" vs 4.5"
Circum. 82.7" vs 88.0"
Revs/Mile 766 vs 720
TM3 18" vs TMY 19"
Diameter 26.3" vs 28.0"
Width 9.3" vs 10.0"
Sidewall 4.2" vs 4.5"
Circum. 82.7" vs 88.0"
Revs/Mile 766 vs 720