Go with bigger sidewalls. This car is heavy and with the beefier hoosier types it grips better than the 30 profiles, which look like rubber tape wrapped around the rims.

Here's a pic with 295/40/18 Hoosiers, but sadly, that size is discontinued. Next closest tire I've found is the toyo RS1 285/680/18 (.5" shorter, but .2" wider)

 

Ha, ha, John S. ..................er................now who just happened to be the Overall Winner at last year's Mustang Roundup....................hmmmm? Was definitely a tiny bit behind you last event ( High Plains Raceway) on Saturday, but then that is what is so much fun with NASA and events around the Midwest - on any given day plenty of us can win!!!!

 

Off year for me. I had mechanical difficulties which put the car in a spin cycle (note: Children, always check rear ride height when installing new springs. Springs that go to full bind in the middle of a fast sweeper will result in a very high probability of entering the spin cycle!). Mechanic was given a severe pay cut as a lesson.

Win? Heh... I just go for show

 

Dang, John , now I understand, but I avoid those pitfalls with boring old stock front & rear sway bars, stock shocks ( so my car is jacked up looking like it's a 4x4 ), no belts, no lightweight hood , nothing but good brake rotors and pads. I am staying that way so I have some ready made, built in excuses................er.............and also I am a member of AARP. This way if I am slow next week I have plenty of reasons why I didn't go fast. Heck I still have Winter air in my tires, haven't switched to fresh Summer air , so my tires could really be stagnant!!!

Besides, you aren't the only one who makes errors, I shoulda fired my help at HRP, as found out my car pushes pretty bad when the front tire is down to cord. Just remember I am at least 15 years older than you , so I have alot more years of learning excuses than you do, ha,ha. We just need to make sure that the next podium has a Boss at the top, not an EVO -- so let's hope it is you, me or Gary on the top step??

 

I have 275/35/19 up front 285/40/19 in rear i want a 275/40/ 19 up front but i dont think it will fit under my fender the 275/35 /19 dose fit 285/40/19 in rear 275/35/19 front lowerd thinking about doing 275/40/19 up front

 

When I bought my 12' GT the Brembo wheels (19x9) had 275/40/19 tires on all fours. No issues. They were just crappy Lexani tires.

 

I used 275/40-19 on all 4 corners before, on 19x9.5 rims. It worked very well.

The Brembo 19x9 wheels will fit 275/40 just fine, but you're not getting your money's worth with 9" rims in that size. Due to sidewall flex you're getting less cross section width in contact with the pavement than if you're using the same tire on a 9.5" wide rim for example.