A couple of months ago i got a Q7 2011 SLine to replace my V8 Touareg...
It's very silver, very spiffy and came with these very attractive 21" wheels.

But reality (and a bit rain, sleet and ice) have now hit...

In my limited experience there are no sensible tires for a Q7 in 295/35R21 size...
and I have not been able to find anyone, in any of the audi forums (how many audi forums are there anyway!?!), that has found a reasonable (all season) tire in this size for when the ground freezes.

So i have been reduced to getting new 20" rims and getting 275/45R20 which seem to be the original equipment size.

That said, i started thinking... if 275/45R20 is OEM size...
Why can't i use a 295/40R21 on these rims?

is there some internal bag com setting i don't know about that knows the difference between wether my q7 has the oem 20" setup or the oem 21" setup?

I say this as 295/40R21 is closer rolling diameter (1.8% diff) to 275/45R20 than 295/35R21 (more than 2% diff)...
and i ask as there are many more sensible tires available in size 295/40R21 than 295/35R21.

in the end... would ideally like to have a an all season tire on the 21"s...
Just trying to think it through.

Thoughts?
Comments? (other than get proper snow tires on 19" rims you jackass)

 

Michelin makes an all-season tire 21 inch. The Michelin Latitude. They are much quieter and wear better than the Dunlop. Your tire dealer should be able to find them easily.

 

thanks for the response.

saw these.
used em on my touareg and experienced very poor durability.
lots of bad punctures and bead breaks... lot's of replacement

that said, they might be the only option.

 

Odd... I had no issues with mine in 2 years. Be sure to check the date codes on the tires, the dealer should provide them. I actually switched to 20 inch Michelins for my A8 as well. Both sets are wearing just fine, with no issues. Best of luck.

 

it wasn't the rolling "wear" per say...
it was pothole & puncture durability.
had to throw away 3 of them before they had any wear issues because of broken beads or unplug-able punctures.
#vermontdriving