SRT Hellcat Forum banner
  • Hey Everyone! Vote for the Site Favourite HOTM winner for the year of 2022 HERE!

275/40-R20 Mickey Thompson ET Street S/S: what PSI at the track?

3008 Views 9 Replies 8 Participants Last post by  Mean Cat
The title says it all. I JUST installed 275/40-R20 Mickey Thompson ET Street S/S on my 2017 Charger Hellcat. I am running about 30psi on the street, but no idea what ballpark I should start at when I get to the dragstrip.

Your thoughts?
1 - 1 of 10 Posts
Start at 22 and work your way down .5 psi at a time until the traction feels right. Dont go below 14 iirc. You can write to MT and theyll tell you for sure. I found my ET Sreet Rs 305/45/17 likes 16-17 psi here in So FL.
Don't expect alot of strip performance out of 20" rims tho.
  • Like
Reactions: 2
1 - 1 of 10 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.