I would have been about 4, because we were still in Newcastle at the time. I had a blue bike, light metallic blue, and whitewall tyres. There was a path ran up the side of our house, the wall of the house on the right, a fence on the left (it were all fields....), and I was riding for the first time without stabilisers. Absolute cliche, my dad holding the saddle, me shouting at him not to let go, him letting go but telling me he was still holding on.
Ah.
Tis my second earliest memory - clearly bikes made a deep impression.
(my earliest memory is of seeing a lizard on a camping holiday in France).