Tulum is a really nice place to bike because it is super flat and there are really nice bike paths. We have ridden to the beach a lot on the bike paths and it is really fun. I have seen two people on a bike at the same time riding down the street and it looks really uncomfortable. At night there are food vendors riding around by our house, honking a horn and it gets really annoying when you are trying to sleep.
When I was biking back from the beach today I took some pictures of the bikes we saw.