Ponywars

anyone running them on a stock brembo wheel? rubbing issues,etc. always use the stock tire size 255 40 19 but its time for new tires and was thinking about going to a 275 40,stock springs in front,55d in rear but am thinking of going with a 1.5 inch drop all around soon (bmr sp009 springs)

Siber Express

Don't know after the drop but you wont have any problems now. I have the same size and offset with my 302s wheels with 275/40 19's all around.
I am doing a .8/1.2 drop on mine this weekend but I am not expecting issues with that.

5.M0NSTER

I use 275/40-19 on 19x9.5 which are 0.5 inches wider. I'm also lowered 1" in the front and 1.25" in the rear. No rubbing at all.

esir_spd

Just keep in mind if you go to a 275/40/19 you are going to increase the overall height of the tire by .7" and also increase the sidewall size. Not sure if you were going for that look or if you just wanted a wider tire.

Ponywars

wanted to go a little wider,but with no drawbacks or i,ll stay stock at 255 40;s

Siber Express

The difference puts you up to the Stock size on the GT/CS which has a 245/45 19.
255/40 19's on stock suspension



275/40 19's on stock suspension

BLK STANG

You won't have any rubbing issues with 275's unless you're slammed on coilovers. I have eibach Sportline springs on my car (drops the car almost 2") and 275/40's on my stock brembo wheels and I still have about a finger and a half of wheel gap on every corner. I'd say go for it, I got pilot supersports and the gain in traction when launching is much improved

ElkGroveFordGuy

I have 275/40/19 on sve 19x9.5 rims and steeda springs, I do have a little rubbing over large pot holes or train tracks!
But no rubbing with track pack rims and 275/40/19 tires!

5.M0NSTER

Interesting. I have that combo on Steeda Sports + Koni Yellows and 19x9.5 SVE drift wheels with no rubbing at all.

Ponywars

i have Michelin PSS on now and am thinking of going with sumitomo htr z 111 tires to save some money,they are half the price of the Michelins but from what i read they are definetely not half the tire! Anyone using them??

sakol

Anybody tried these new Nittos size 275/40/19s on their 19x9.5s?

dmichaels

I'm doing testing in these right now for Nitto. I have a dedicated thread... I'll post a link

dmichaels

My Nitto test thread: https://themustangsource.com/forums/...arison-541336/

Ponywars

any drawbacks at all from going to the 275 40 from the 255 40 19;s??? will i have to get the car re aligned?

5.M0NSTER

Only thing is your speedo will be a little off. When your speedo says 65 you'll be doing 67 or 68. If alignment was fine before new tires it will be fine after.

EF1

I agree with 5.Monster, no drawbacks other than speedo. I made the switch from 255 40 19 to 275 40 19 on my stock brembo wheels recently. I like the way they fill the wheel well out a little more and the traction has been very good. I was quite impressed with the Bridgestone S04's at the Camp Steeda Sebring event last weekend.

Siber Express

The way Ford programs your speedo it is off from the factory, it could actually correct it by going to an optional GT tire size.

EF1

Please explain. The 255 40 19 was the factory tire size on my car. I am not sure if the 275 40 19 was offered from the factory.

Siber Express

My Car came with 255/40 19's, 27 inches tall just like yours, by GPS and 2 Tennessee Highway Patrol radars say I was always 3-4 miles off from the factory, 1 MPH over with the 275/40 19.
The 275/40 19 is the same size as the 245/45 19 offered as a tire when you bought the California Special.
You speedo is more than likely set for the 27.3 tire height for the OEM 235/50 18 and it is still off from the factory more than likely.

EF1

Thank you for explanation. I assumed that Ford would set the speedometer for the oem tire, not another size offered on a similar car with another size.