Challenge is coming out with an even fatter fattie. The Eroica. 32 mm as I remember. Sound pretty neat, with fuller wrap on the tread layer for those gravel roads, etc. But I haven't seen them for sale anywhere.
27 is about right, though. I think I'm going to spring for a set of Parigi-R's for my new bike.
Anybody buy the black wall P-R's ?