Honestly I haven't. I'm planning on using 32c tires (35 max). And the occasional road tires+fenders. Also I wanted the frame to be as compact as possible, so wider tires won't fit for sure (atleast not in the back).
You are misunderstanding. Skinny 650b tyres will allow for wicked geometry.
@Hulsroy started
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Honestly I haven't. I'm planning on using 32c tires (35 max).
And the occasional road tires+fenders.
Also I wanted the frame to be as compact as possible, so wider tires won't fit for sure (atleast not in the back).