Where I live we get delivery cyclists racing down pedestrian precints at scary speeds. And I've similarly thought "someone's gonna get killed here one day, and

Where I live we get delivery cyclists racing down pedestrian precints at scary speeds. And I've similarly thought "someone's gonna get killed here one day, and possibly not the rider". This was true even with ordinary pushbikes or lighweight electric-assist bikes, but in the past couple of years most of the full-time riders seem to have moved to thick tyred and heavy motor-only bikes, which carry a lot of momentum down those busy shopping streets