CA 2.0, Tire clearances and wheels sizes.
There have been some questions about the new CA 2.0 wheel, tire clearance and brake reach. I’ll try and clear those up here.
The 650c (that is 571 mm ) rear end CA 2.0 has 11mm clearance between a 23 mm x 571mm tire and the frame,
Short reach brakes like the Zero-G will reach the 650c (571mm) rim with no problems.
You can put a 559 (26” mt.bike rim) in the frame and with the Bacchetta rear brake it reaches the rim no problem, room to spare. Put a 26 x 1.25” (32mm) like a Kenda Qwest you have 6mm clearance between frame and tire.
The 700c (620mm) CA 2.0) current proto-type rear end with a 700c x 23mm tire gives you 6mm clearance between the tire and the frame. The Zero-G short reach brakes fits with no problems and it looks like we could add 3mm more of length to the chain stay to gives us some possible options of getting a 28mm tire into the 700c rear end.
Looks like the CA 2.0 is going to be a great all around bike, I can envision many uses of this bike from hard core racing to light touring and of course doing the full brevet series.