Looks like the current L&K superb comes with the 19" aero alloys as standard

 

There is a no cost option for the 'snowflake' ones

 

Is there any info anywhere on how much the aero ones save ? Are we talking as much as 1 mpg and motorway speeds ?

 

 

As standard it comes with 18 inch wheels in the UK. 19 inch wheels are an upgrade. I'd have thought the aero difference would be fairly negligible - your driving style will have a bigger difference.

 

The 18 inch wheels should be better on fuel economy than the heavier 19 inch wheels.