Tire Sizes for 20'' Wheels

[kgroschi]

PURCHASED EVERYTHING TODAY!!! WILL BE INSTALLED TOMORROW! CAN'T WAIT!!!

I bought 20x9 ET38 245/40/20 for the front and 20x10 ET40 275/35/20 for the rear. I think it will look good. Not super aggressive offsets, but just enough.

 

[SomeJoe7777]

Max tyre width on 9" rim is 265, @kgroschi.

More relevant info to be found here: Visual Tyre Size Calculator | Kouki Tech

Michelin Pilot Super Sport 275/40R20 specs show that it can fit on a 9" rim, but the recommended rim size would be 10".

 

[SomeJoe7777]

PURCHASED EVERYTHING TODAY!!! WILL BE INSTALLED TOMORROW! CAN'T WAIT!!!

I bought 20x9 ET38 245/40/20 for the front and 20x10 ET40 275/35/20 for the rear. I think it will look good. Not super aggressive offsets, but just enough.

Congrats! Please post pics once you get them on the car. What wheels and tires did you go with?

 

[kgroschi]

Congrats! Please post pics once you get them on the car. What wheels and tires did you go with?

Thanks! I will of course do that!

I got the Conti's Extreme Contact DW and the Niche M177 rims in black.

 

[tchockie]

i was just thinking this morning, "hm, i think i'm gonna put 20s on, which tires should i get" and BAM this thread is perfect. thanks for the info in this thread

 

[kgroschi]

i was just thinking this morning, "hm, i think i'm gonna put 20s on, which tires should i get" and BAM this thread is perfect. thanks for the info in this thread

Awesome! Glad this thread was able to help you! I posted the pic of my car in another thread though I believe. I will look for it and post one more time.

 

[tchockie]

Does anyone have experience with running 255/35R20 on the fronts? I'm trying to finalize my tire choice for the new 20x9s i'm about to get. It seems from my reading that 255/40R20s seem to rub a bit at a certain angle, but wondering if the 255/35 would clear it.

For comparison:
245/40R19 has a diameter of 26.7" (778 rev/mile) with approx 9.6" width
255/35R20 has a diameter of 27" (769 rev/mile) with approx 10" width

255/40R20 has a diameter of 28" (741 rev/mile) with approx 10" width

Just for reference, the OEM 21" turbines come with 245/35R21, which has a diameter of 27.8"

 

[tchockie]

Wait, does the stock 19 slipstreams come with 245/45R19? If so, that's a 27.7" overall diameter. Then I could see why 255/40 should be close to 19 OEM, but i guess that 0.3" difference in diameter and slightly more wide size is what's causing the rubbing?

 

[Taylor Sherman]

Yep they are 245/45R19 stock on the slipstreams.

I just ordered some 20" wheels, 9" front and 10" rear, with 245/40R20 front and 275/35R20 rear, ET35 all around. They should get here tomorrow but I won't have them mounted for a couple of weeks probably.

 

[Amclymon]

I just bought 245/40 275/35 for my Forgiato wheels