1. The weight we need to bear when running is our weight. Long-term running can increase our bone density Q, while riding only will reduce our bone density, and falling off the car will lead to more fractures.
2. Riding is not helpful for daily hiking. This is what I saw from the video told by retired cyclists. They will complain that they feel very tired during their career and can't travel with their families.
3. Riding needs a specific environment. For example, my city is uphill and there are few non-motor vehicle lanes, which is not conducive to my riding.
It is suggested to combine the two exercises, after all, a single exercise is always boring.