Bikers (motorcyclists) or cyclists? Very big difference in the speed and danger. In fact, a friend of mine who got one of those fancy e-bikes that can go up to 30km/h without any pedalling hit a patch of gravel and broke his wrist last summer. He's cycled all his life, at similar speeds, but when you're pedalling you know your speed and act according to it; just sitting still on an e-bike doesn't give you the same control.

By the way, a little figure for those here who might be green-ish - switching one person's commute of four miles (6.5km), which is the average length of a commute, from a car to a bicycle saves half a ton of CO2 a year - which is 5% of the average person's carbon footprint. Add in lots of cycling to the shops and to meet buddies in the cafe, etc, and you can really cut down that carbon use.