If by "change to the Ridley Noah frame" you mean "buy a different bike instead," then it's possible. It's sold on this site.
- 0 Reviews 0 Helpful
- 0 Questions 0 Helpful
- 28 Answers 7 Helpful
- 0 Photos 0 Helpful
- 0 Videos 0 Helpful
- 0 Comments 0 Helpful
Absolutely. In fact, it's intended for bicycling.
Just eyeballing the tread, they don't seem especially well-equipped for trail running. They seem more like road-running shoes. I'd suggest something more toothy, like the La Sportiva Wildcat or Raptor. I've run Tough Mudder in them four times and loved them.
It's possible this would be effective against bears, though it's worth noting that civilian pepper sprays (like for use against muggers) are basically useless against bears. Most bear sprays have a blend of capsicum and other irritants. I'd check with the manufacturer, and if they don't explicitly recommend it for bear, don't bring it.