Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
  • The final cut of the 8th episode of the Tesla Motors Club Podcast, featuring Balazs Biro, of the prominent Hungarian EV channel Villanyautósok, is now available. You can watch it now on YouTube or listen to it on all major podcast networks.

Mikey Thompson Radials

I like the MT Street Comps but need some input on fitment (this gets complicated)

I am running TSW staggered Nuremberg rims
20.8.5 Front
20 X 10.5 Rear
I currently have Sport Comps 245/40/20 and 275/35/20

The MTs have a 275/35 but only a 245/45

The Sport Comps 245/40 are 25.72" tall where as the MT 245/45 are 26.68" tall, will they fit the front?

If the front does fit MT has a 275/40 for the rear will these fit?
Last edited:


Mayor Gnomus Vintage Limb
Jul 12, 2013
What you need is a good tyre claculator, B.

I tend to use this one. There are several others, but this one is simple and efficient.


As far as I know you NEED 245/40-20 in front, as nothing else will fit. Except for 255/40-20 that may rub a little with some cars and not so much with other S'es.

If the ET value of the rear wheels is low enough (< 35), you can go for 275/40-20 or 285/35-20. Given the 10.5" width of those rims, the 285's seem the best fitment.


Active Member
Feb 13, 2013
If Micky Thompson's run wide, like Hoosiers, you'll be inviting some rubbing. Competition tires are running wider, at each width spec in my experience. Drag radials may be different.

If you can find the MT revolutions per mile spec, that would be the best "go by" to tell how much you're flirting with stability control. Otherwise, I wouldn't want to go much more than 3% from the 245/40/20 diameter, front to back. That's because I don't think anyone knows how much you can mess with diameter differences, before Tesla's uber-aggressive TC system acts up.

Products we're discussing on TMC...

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.