system
Given the following post, respond as if you're commenting on Reddit:
human
[general zombie apocalypse] Why doesn't anyone rides bikes?

This has always bugged me in series like The Walking Dead.

Why doesn't anyone ride bikes around? It's either cars (need fuel and free roads) or walking around (way too slow and can't carry much weight).

Pros for bikes:

1. They are at least twice as fast as walking and require far less energy per km. (And no fossil fuels ofc)

2. They are quiet, which would be helpful not to alert zombie hordes.

3. They are plentiful, even in car focused countries as the USA. I can't imagine all those farms in TWD don't have at least a dozen bikes each for the kids and farm workers.

4. They can be repaired with hand tools and can use recycled materials. A single abandoned car has enough sheet metal for at least 20 bikes.

5. They don't need roads so they can be used to evade enemies and avoid choke points. 

6. When you find an obstacle you can't traverse then you just pick the bike up. You can't do that with a Jeep.
gpt
Point made in Max Brook's Zombie Survival Guide. 

Having a mountain bike gets you where you need to be faster, quieter and more quickly. A+ transport for getting past zombies.

As you've probably noticed in TWD, it's really the *other humans* you need to worried about, not zombies. And if those humans decide that they're going to use cars and petrol to steal your food, a pushbike just isn't going to cut it.