B8 21 inch rotors or 20 - Audi A5 Forum & Audi S5 Forum
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post #1 of 10 Old 11th April 2019, 03:17 PM Thread Starter
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B8 21 inch rotors or 20

Hi guys.
I think I have a B8 (2013) sportback SE.

Would 21 inch rotors fit on it?

Or is 20 the limit?

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post #2 of 10 Old 11th April 2019, 11:50 PM
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Yes 21s would fit, the tyre wall just gets smaller to keep the overall rolling radius of the tyre the same as as near as dammit

I got 19 rotors for mine, deep dish/concave version, look 100 times better. I would have gone for 20" but the tyres on my 19" Y spokes were good, so swapped them over. Could have sold the Y spokes and tyres and got new 20" tyres, but hey ho.

The Y spoke have got winter tyres on them now.
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post #3 of 10 Old 12th April 2019, 12:12 AM Thread Starter
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Originally Posted by Dave Kwatro View Post
Yes 21s would fit, the tyre wall just gets smaller to keep the overall rolling radius of the tyre the same as as near as dammit

I got 19 rotors for mine, deep dish/concave version, look 100 times better. I would have gone for 20" but the tyres on my 19" Y spokes were good, so swapped them over. Could have sold the Y spokes and tyres and got new 20" tyres, but hey ho.

The Y spoke have got winter tyres on them now.
Hey thanks for the response.
Beautiful car.

Oh you get different types of rotors?
I didn't realise. Lol.
Which type (model) do you have on yours? And are they genuine or replica?

Maybe 21s would be a bit over kill, I prefer a slightly smoother ride. Lol


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Last edited by crazeuk; 12th April 2019 at 12:26 AM.
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post #4 of 10 Old 12th April 2019, 01:01 AM
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Quote:
Originally Posted by crazeuk View Post
Hey thanks for the response.
Beautiful car.

Oh you get different types of rotors?
I didn't realise. Lol.
Which type (model) do you have on yours? And are they genuine or replica?

Maybe 21s would be a bit over kill, I prefer a slightly smoother ride. Lol


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21s would be very weak, and only have a rubber band to protect them. Ehhh

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post #5 of 10 Old 12th April 2019, 01:28 AM Thread Starter
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21s would be very weak, and only have a rubber band to protect them. Ehhh
Lol. Okay. It's a very bad idea. Lol.
So I guess the new question is 19s or 21s

And what is the easy way to tell the difference between different styles and part numbers?

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post #6 of 10 Old 12th April 2019, 04:30 AM
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Originally Posted by crazeuk View Post
Hey thanks for the response.
Beautiful car.

Oh you get different types of rotors?
I didn't realise. Lol.
Which type (model) do you have on yours? And are they genuine or replica?

Maybe 21s would be a bit over kill, I prefer a slightly smoother ride. Lol


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Yes, you can get 'flat' ones, which are fitted to A3, A4, A6. Concaved are fitted to A5 and A7, as far as I know.

Mine are reps, but look as good as the originals. 520 for 4!! The 20" version was only an extra 40!!! I was tempted!!

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post #7 of 10 Old 12th April 2019, 04:53 AM Thread Starter
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Yes, you can get 'flat' ones, which are fitted to A3, A4, A6. Concaved are fitted to A5 and A7, as far as I know.



Mine are reps, but look as good as the originals. 520 for 4!! The 20" version was only an extra 40!!! I was tempted!!
Definitely the concave version for me. Right now I have these on.

I've heard the replicas quality isn't as good?

I just need to find some 20s lol that are not super expensive. Lol

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post #8 of 10 Old 13th April 2019, 02:04 AM
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From personal experience with bigger wheels and "rubber band" tyres i would say go for oem wheels rather than some aftermarket wheels as eventually you will get loads of problems.
After i have upgraded mine from 17" to 18" on previous car probably year on having them on one started leaking air and it was inly cracked in 4 places around the wheel... 🙂
You get what you pay for as they say 😉

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post #9 of 10 Old 14th April 2019, 11:29 AM Thread Starter
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Originally Posted by x3me View Post
From personal experience with bigger wheels and "rubber band" tyres i would say go for oem wheels rather than some aftermarket wheels as eventually you will get loads of problems.
After i have upgraded mine from 17" to 18" on previous car probably year on having them on one started leaking air and it was inly cracked in 4 places around the wheel... 🙂
You get what you pay for as they say 😉
From historical experiences, i would agree, OEM is the way to go. The aftermarket imitations are never good.
For this, i will certainly be looking for OEM.

The decision is done i think. 19" Concave OEM's. Now i just have to find them lol
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post #10 of 10 Old 17th April 2019, 05:52 AM
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Are there tyre walls thin enough to support a 21" wheel on the A5 with the same rolling diameter as OEM? I'm running 20" and am on 30 profile tyres, can't imagine it being any lower lol.
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