5 mpg? Really?I have a 15 Golf TDi SEL. Got a flat within a month with 18s. Also thought the ride was harsh. Swapped out with a fellow TDI club guy. I took his 16s and some cash for 18s. Amazing difference! The ride quality is significantly better. Also, I am a driving enthusiast and love a great handling german sporty ride...And I have not felt any major drop in handling. At all. The ride is so much smoother. I don't hold my breath on bumpy roads and potholes now. And I easily got about a 5mpg increase in Fuel economy.