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hi guys,

i'm contemplating on an idea to take my RS to the Alps during Christmas break... one really qq re tyres. Would it be worth going for 275 40/20's instead of original 35 fitment for "extra" comfort?

Assume this is / will be safe to use on Quattro so long as all 4 x tyres are of same height?

275/35 = 96 (approx). 275/40 = 110, so the tyre wall will be approx 14mm higher (depending on make and model as all tyre sections are nominal measurements).
You could well get some rubbing at the back especially when loaded and at the front on full lock.

cheers Jim.

And it should go without saying (but I will) the speedo will under read by about 4%.

Jim Haseltine wrote: ↑

Fri Nov 23, 2018 10:14 am

And it should go without saying (but I will) the speedo will under read by about 4%.

hahah ... that's a nice one.

reason why i'm asking is that 35 profile are tad challenging to source at acceptable prices and I have a hard time convincing myself to spend a "grand+" on something I'd only use for single trip to the Alps. Hence the ask for 40 profile that are somewhat more cost-effective (but with caveats that you outlined Jim).

Could try a 265/40

thanks Doug.

Wonder if anyone tried 265/40 20's and how do they fit to a car?

Dunno, but I'll tell you this, once you've driven with winter tyres you'll want to fit them in this country when the temperature drops. The grip is amazing compared to summer or all weather tyres. There are downsides though, they don't last long when things get warmer and they're usually rather noisy on dry roads.

I've probably said this before, but I find the best method is to have a second set of wheels with winter tyres fitted.
Smaller diameter (assuming the car brake geometry allows this) with deeper tyres to maintain the same rolling radius.

HPsauce wrote:I've probably said this before, but I find the best method is to have a second set of wheels with winter tyres fitted.
Smaller diameter (assuming the car brake geometry allows this) with deeper tyres to maintain the same rolling radius.

Not much other than std would fit RS tbh... hence the ask to see what options if any are out there.


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c3nturi0n wrote: ↑

Sat Nov 24, 2018 5:31 pm

thanks Doug.

Wonder if anyone tried 265/40 20's and how do they fit to a car?

By reducing the width you reduce the radius too as the 40 is a percentage of the width. It will also very slightly pull the sidewalls in giving a little more clearance.

265/40 is 106mm - approx 10mm higher than a 275/35 sidewall.

You will lose some of that 10mm though as the sides pull in giving a more rounded sidewall.

Guess car won’t loose much on stability and performance etc.?


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I wouldn't of thought so. I mean they compound and design of the tyres will be the most obvious change.