Challenge Strada Bianca 700X30s. Bit of a wrestling-match to mount, as others have observed, but on an Archetype rim they fit in my Kirk with about 3-4mm all around (between the chainstays, behind the seat tube, and under the brake).
I like having a tire that's exactly the right fit. Compass Chinooks are mighty nice to ride, but I thought I could wedge something a tiny bit bigger in there, and if the SBs don't stretch too much after a week or two of sitting with 120psi in them, I'm golden.
As a welcome bonus, they also fit my '80s-era Ciöcc. Who'd have guessed? Don't think I'll be able to get them in the CRL or the Corsa Extra, but... I've got tires for those bikes.
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