2THRSQ

I have just been given the opportunity to purchase an RS7. It has 21 inch wheels. The Tire size is 275/30r21. I found that Dunlap makes a SP Winter sport 3D tire that is sized at 275/35r21. That is 1.1 inches bigger in diameter. Does anyone know if this tire will fit in wheel wells without rubbing? Does anyone know of any other 21 inch high performance winter tires? I live in Alaska and we have snow 8 months a year. I put Blizzaks on my current A7 and they have done fine. Unfortunately they don't make a 21 inch tire that I can find. I'm just trying not to buy tires and wheels in a different size. Thanks.

37s

My installer said...

"They are 5% of 275mm taller. The diameter of the 30 is 82.5 mm and the diameter of the 35 is 96.25 mm. Therefore the difference is 8mm overall. 4mm is half the diameter and that is the number you have to be concerned with so it is maybe 3/8 of an inch larger and I know you have clearance so the 275/35R21 will work."

I think I'm going to go in this direction too.

37s

I can confirm... YES, the Dunlop SP Winter Sport 3D 275/35/r21 fit on the RS7. I have them on the car now.

2THRSQ

Awesome. Thanks to both replies. My RS 7 should be here by February. My build date was week 48.