If you mean the non-standard (for the Superb MK4) 6Jx17 ET48 alloy rims from the Octavia MK3, then perhaps also consider non-standard (for the Superb MK4) 6.5Jx17 ET41 alloy rims from the Superb MK3. These have the same ET41 offset that the Superb MK4 7.5Jx17 ET41 rims have, but they have a 1" smaller rim width at 6.5". With the 215/55R17 tyre size, a 7.5" rim width doesn't offer much protection for the rim from kerbing damage because the tyre's sidewalls don't bulge out much. As you can see in the ETRTO chart below, 215/55R17 can be fitted to a rim width between 6" and 7.5". Out of the four allowable rim width fo the 215/55R17 tyre size, my preference would be 6.5" followed by 7". One owner mentioned that their alloy rims from the "skoda alloy rim accessory catalogue" cost about 20% more at UK VAG dealers compared to the online Czech price. However, one owner purchased from "skoda parts com" where the website claims that they are set up to pay the UK VAT. Prices at "skoda parts com" seem to be similar to "skoda eshop cz", although unlike "skoda parts com", "skoda eshop cz" don't appear to be setup to ship to the UK. It's best to purchase winter tyres in the summer, or at least by September...because demand and prices increase dramatically from October onwards. ETRTO approved rim widths for passenger car tyres 215/55R17 6.0-7.0-7.5 225/50R17 6.0-7.0-8.0 6.5Jx17 ET41 5/112 57.1 alloy rim TRITON (from Superb MK3...non-standard for Superb MK4) https://www.skoda-parts.com/catalog/superb-3/spare-parts/accessories/wheels-steel-aluminium/aluminium-wheel/17-895.html As you can see below, the winter wheel sizes for the Superb MK3 are similar to the Superb MK4 winter wheel sizes, ie. 0.5" narrower and with 2mm less offset. For the 215/55R17 tyre size, my preference would be a 6.5" rim width rather than the slightly wider 7" rim width. The 0.5" narrower 6.5" rim width provides better protection for the rim from kerbing damage because the tyre's sidewalls bulge out a little more. Technical specifications (from Superb MK3 owner's manual)Permitted rim / tire combinations for the installation of the snow chains. Rim size Wheel size 6.5Jx16 ET41 215/60 R16 6.5Jx17 ET41 215/55 R17 Only use snow chains with links and locks no larger than 13 mm.