I like my 20" Dahon a lot but 20" wheels are significantly harsher than larger wheels. My riding style has adjusted a great deal to compensate for this but at some point, when I have the storage space, I'll probably buy a road bike. Anyhow, I'm looking forward to (and assuming that) Big Apple Liteskin tyres will be available soon; I'd like to switch to a 2.35 at the front to absorb shocks better.