Well, I thought I’d share this set of images.
This is the Bontrager Barbegazi, at 20psi, on a Nextie 65mm external rim – 27.5×4.5 (770mm diameter and 115mm casing width, a few more knob to knob).
Compare to a fairly normal 29×2.2 MTN King.
Now, it is next to a Bontrager Chupacabra 29×3 (765mm diameter iirc).
Perhaps most interesting…next to a 26×4.5 Flowbeist (somethign like 745mm diameter – I think! might be 750mm)
As predicted, the Vertigo cycles fatty is a hoot with a 29+ front/27.5+ rear. I actually think it might be bad for my health. Just today alone, I crashed 3 times. Not because I lost traction, more because I was tackling obstacles at a greater speed than I am used to. As a result, I was landing closer to stumps, trees and other immovable objects than I am used to. Sometimes, too close! Interesting.
My curiosity will get the better of me though – I will pull the rear Chronicle in order to mount a Hodag so the bike will be more balanced when I put that Barbegazi on the front.
Oddly, the tape I use (3M 764) failed the first time I mounted the Barbegazi. The tape is 50mm wide so I did one wrap and then dry mounted the tyre, as I usually do, before addign sealant. In this case, the bead seemed to grab the tape on both sides and drag it apart, tearing it down the middle. I re-did it with a little sealant to lube the bead’s passage up the rim into the bead socket and it was golden. Live and learn.