It depends on how fast you can ride a bike!
The size of the bike depends on the riders size and experience. The rider should be able to hold the bike up easily while sitting on the seat, and their feet on the ground. Some new riders start with a smaller engine bike until they get used to riding.
Not all, but quite a lot of them do. Those who don't ride themselves are amazingly tolerant against bike riders.
it obviously depends how fast you can ride a bike and how long you can go without stopping
Perhaps this refers to very overweight or very underweight riders ?
Sure, I can ride fast in all weathers
about 40mph+ or 50mph+ depending on riders weight
put helium in the tires and pedal fast
it depends on how fast you ride or if your gowing up a hill
-the bikes weight -the riders weight -the riders strength -the gear shifts and how well they are used -terrain hope that helps! :)
You can fall off the bike, you can ride into things, pedestrians, other riders, you can be ridden into by other riders, you can get hit (and run over) by a car. Longish rides in hot weather can leave you dehydrated and you can get sunburn. If you begin to ride too hard too fast you can get overexertion issues, particularly if your bike doesn't quite fit you. Oh, and you can fall in love with the sport, spend ridiculous amounts of money on gear, and become quite boring for all but other cyclists to talk to.
If you mean ride a horse, then yes. If you mean ride a bike, then yes, but you may slip if you try to corner fast.