wrote:
John Kane wrote:

A push bike typically refers to bicycle (human powered). I was
talking to a sport shop owner the other day and said that I was in
the shop to look at the push bikes not the motorbikes.

It's not an expression that I see or hear used frequently and I was
wondering if anyone has an idea of the origins of the phrase?

Push bike is a terribly British affectation. In the USA, "bicycle"
has always meant a pedal driven two wheeled vehicle, just as in
German, it has always been a "Fahrrad", whereas in Italy it is a
"bicicletta" unambiguously. In Switzerland the term "Velo" is widely
used although, depending on which of their four languages is local, it
could be German, Italian, French, or Romansch usage.

http://en.wiktionary.org/wiki/push-bike

Maybe, because of sharp stuff puncturing their tires (tyres, over there),
they had to push them a lot. No?
--
Skitt (AmE)