This is super important and the answer will help many people. I've spent over an hour researching how tire sizes work and how to answer the question in the thread title. The following is what I believe to be the case from my research. Please let me know if I am wrong.
Stock tires on the M3 18" OEM Aero rims (2017-2020 version) are 235/45 18, meaning 235 wide, 45 aspect ratio, and made for 18" rims. however, with this width, the Aero rims stick out beyond the side of the tire leading to rim rash. The time has come for me to replace my OEM tires and I would like to replace them with tires that stick out beyond the rims (like most cars have) in order to protect the rims. From what I can tell a 255 tread width is the widest the M3 18" OEM Aero rims (2017-2020 version) can take. because the tread width is wider the aspect ratio (45 on OEM) has to be reduced one size smaller so that the overall tire diameter remains roughly the same.
Therefore it seems that tire size 255/40 18 tires are the best option for M3 18" OEM Aero rims (2017-2020 version) for the purpose of a tire compatible with said rim but with a maximum width. There are so many Model 3s with OEM Aero rims from 2017-2020 but I can't find good answers to the questions below.
Questions:
1.) Is the above true?
2.) Has anyone tried this? Which specific model of tire?
3.) Has anyone gone to a rim repair place in or around Los Angeles that they are happy with? How much did they charge?
Thanks for your help with this.
Stock tires on the M3 18" OEM Aero rims (2017-2020 version) are 235/45 18, meaning 235 wide, 45 aspect ratio, and made for 18" rims. however, with this width, the Aero rims stick out beyond the side of the tire leading to rim rash. The time has come for me to replace my OEM tires and I would like to replace them with tires that stick out beyond the rims (like most cars have) in order to protect the rims. From what I can tell a 255 tread width is the widest the M3 18" OEM Aero rims (2017-2020 version) can take. because the tread width is wider the aspect ratio (45 on OEM) has to be reduced one size smaller so that the overall tire diameter remains roughly the same.
Therefore it seems that tire size 255/40 18 tires are the best option for M3 18" OEM Aero rims (2017-2020 version) for the purpose of a tire compatible with said rim but with a maximum width. There are so many Model 3s with OEM Aero rims from 2017-2020 but I can't find good answers to the questions below.
Questions:
1.) Is the above true?
2.) Has anyone tried this? Which specific model of tire?
3.) Has anyone gone to a rim repair place in or around Los Angeles that they are happy with? How much did they charge?
Thanks for your help with this.