Hard to say without an experimental fitting and knowing the profile of the 20" tires. What will happen for sure is a harsher ride, and some loss of power and braking.
By accessing this website, you acknowledge that Edmunds and its third party business partners may use cookies, pixels, and similar technologies to collect information about you and your interactions with the website as described in our Privacy Statement, and you agree that your use of the website is subject to our Visitor Agreement.
Answers