When I bought my 2010/11 i30 Premium model there were no mudflaps available that would fit. It was because the car had a body styling kit that reshaped the sills. Even now the UK Hyundai options list for the previous i30 states that the mudflaps will not fit the Premium model or the UK i30 Edition
http://www.hyundai-car.co.uk/accessories/all/?modelName=i30&ref=176
All the Hyundai material states "will not fit the Edition or 2011 model" hence my query. So are the sill mouldings different for the pre-2011 build and the Edition/2011 versions and, presumably, the Edition has 2011 sills?
If so as your car is a 2010 Premium why won't the advertised mudflaps fit your car?
That's probably why they say "won't fit 2011" model but our (Australian Delivery) i30's are pretty much identical to the earlier versions and only the SR gets the body kit...
But surely Baradeur's question will be about a UK car?
I reckon that i30's Czech built after about April 2010 (& referred to as 2011 spec) in UK grew a sort of body kit including sill extensions and different bumpers & grill. All a bit similar to the Edition model but not the same. So different mudflaps are needed.
The mudflaps for the "2011" model were unavailable for ages - but I did get some (genuine Hyundai ones) for mine - part Nos:
2r460ade10 & 2r460ade20, about £50 in total.
As I recall they were really easy to fit - all the holes are there already - maybe needs a couple of wheels removed to get at them.
Ed