How big should the front blade of the Kanzo Adventure be?

The answer depends on your set-up, if you ride with a single front sprocket then you can go up to 42t maximum. Those who ride with a double front can go up to 38t.

Did you know that we have developed a passport for each frame which contains all information on spare parts such as hangers, but also plugs, bottom brackets and seat post clamps? 

Download the passport here: https://www.ridley-bikes.com/technical-information/