Sorry to disagree with you, but not everyone wants 18" wheels. If you want sporty 18" then buy the 250 Sport, the SE-L has 17" wheels to add to the luxury and ride comfort of that model.
As for the folk moaning about the spacesaver spare wheel, what do you expect when the front and rear tyres are different widths? I supose you could carry 2 spare wheels, or cheaper still just buy the base model 250.
Oldun
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Wheel size has nothing to do with ride confort, that's handled by the suspension and the side wall of the tyre and tyre compond, there are many reasons why a manfacture uses a spacer saver wheel/tyre there might have underfloor package issues with say the muffler system, they need to have bigger mufflers to achive the legal drive noise requirement or they may want to either meet or be better than the competition with boot space, the main reason is to save money.