27" x 1" bicycle tyres (25 - 630) used to be commonplace and readily available in all bicycle shops years ago in the UK and I imagine the US. Nowadays they're impossible to locate here in the UK. I want to get my old pushbike out again but the original tyres are perished, hence the need for a...
Neither they're far too small for you. You need at least a 400cc or 500cc scooter. Or better still get yourself a proper motorcycle like a Triumph or Harley.