RS7 Wheel & Tire Size Question

[Bclippard]

I am looking at a set of wheels and the sizing sounds a little funny.

The Wheels were 21x10 et 25
Tires 285/30R21

I wanted to see what everyone though of that fitment? I also wanted to see if you think the 275/30r would be to much of a stretch on a 10 in rim? I had just replaced the contisports on my RS7 (21x9 Blades) with PS4S 275/30r and don’t want to have to buy another set of tires unless it is necessary.

I tried researching but wasn’t able to figure it out. I have the worst time with wheel tire size combos.

Thank you,
B

[widebodyfx]

I run 285/30-21, on a 10.5 +35 but config is similar.
https://www.willtheyfit.com/index.php?width=285&aspect=30&diameter=21&wheelwidth=10.5&offset=35&width2=285&aspect2=30&wheel_size=21&wheel_width=10&offset2=25

3.7mm more poke will work fine front and rear from my experience. 275 will stretch a little but the Michelin shoulders seem fairly squared.
https://oimg.photobucket.com/albums/v319/oc-rookie/Audi/BC_Forged_EH307_08.jpg
https://oimg.photobucket.com/albums/v319/oc-rookie/Audi/BC_Forged_EH307_09.jpg
https://oimg.photobucket.com/albums/v319/oc-rookie/Audi/ze_rump_01.jpg

[Bclippard]

Thanks that helped a lot!

[IowaRS7]

Generally speaking +25 on a 10” wheel should work, but it’s important to look at the concave profile of the wheel design and maybe check with the wheel manufacturer, or share the wheel info to see if anyone has tried them. Our brakes are pretty massive. A 275 on a 10” wheel will stretch a little, but shouldn’t be too bad. Not all 275s are the same either, one can be wider than another. The performance Michelin’s tend to be wider than some others.

[Bclippard]

I am looking at the BC Forged HCA382 https://www.bcforged-na.com/modular/hca382/ with PS4S 285/30.

Thanks,



Generally speaking +25 on a 10” wheel should work, but it’s important to look at the concave profile of the wheel design and maybe check with the wheel manufacturer, or share the wheel info to see if anyone has tried them. Our brakes are pretty massive. A 275 on a 10” wheel will stretch a little, but shouldn’t be too bad. Not all 275s are the same either, one can be wider than another. The performance Michelin’s tend to be wider than some others.