Find a frame you like- see if the 27s fit.
My 1986 Trek 400 Elance came with 700c wheels on it. I changed it TO 27" to fit the reach for a specific set of brakes. I was running 700x32, but I had to go to 27 x 1 1/8" because of fork crown clearance issues.
My *guess* is that the Superbe calipers will be able to go UP enough in a position to reach 27s, where most Superbe calipers wouldn't be able to reach low enough to go from 27 to 700c.
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*Recipient of the 2006 Time Magazine "Person Of The Year" Award*
Commence to jigglin’ huh?!?!
"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.