Hi

I have a couple of questions regarding 20” wheels on a Superb 280 hp. 
*What et should I aim for? 35? 45?

*What inch width should I look for? 8,5”? 10”?

 

Does 21” wheels fit?

 

Today I have a white L&K with 19” rims but would like to have new ones. 
 

Please post inspirational photos if you like. 

You can't look at ET independently without looking at rim width, together they impact how far out/in the wheel will sit. Which is why ideally you should use an online wheel calculator to quickly see the result you would get:

https://www.willtheyfit.com/index.php?width=235&aspect=40&diameter=19&wheelwidth=8.0&offset=44&width2=235&aspect2=40&wheel_size=19&wheel_width=8-5&offset2=37

In the link above I have used the stock tire and wheel size vs the new alloys I have put on mine (Ispiri FFP2 8.5x19 ET37). As you can read in the left side of the page, with that combo the wheel sits 13.4mm further outside and it fits perfectly fine, still inside the arches, nothing extreme, no rubbing etc. It doesn't even look like an aftermarket size. That's because the stock tracks of the Superb are ridiculously narrow.


So roughly, for a 8.5J wheel ET could be as low as 35, For 9.0J you should go up to ET40 at least, in general  any width & ET combo that pushes the wheels out as far as 15mm more still fits fine, after that you could be risking tire rubbing, so use that calculator above with that 15mm as your target value to evaluate your options.

In terms of inch size 20" fit very well, but 21" even though fits in theory with a 235/35/20 tire being the closest to the stock wheel diameter it would be worryingly low profile and I would personally advise against it. 


Below is mine on the the 8.5x19 ET37 Ispiris (and Eiback Pro-Kit)


 

I have my sight set in these Ocean OC-01 in size 8.5x20 5x112 ET45 72,6

 

Or if possible in: 9.0x21 5x112 ET45 72,6