I have entertained thoughts of doing the Cino ride on a SRAM 2-speed autoshifting rear hub. It's definitely less overall climbing than CA Eroica (and far better supported) though 9-mile hill on day 2 will challenge most riders. I know that @
bironi and @
northbend, among others, have done Cino on a fixed gear, and I'd be curious as to what gear they ran. But those are two very strong and heroic riders!