Thank you folks.
Since I was placing an order with REI anyway I went with the Pasolos based on input here (thank you for measuring them )and reviews.
But of general interest, check out the Club Roost Cross Terra....
http://www.treefortbikes.com/product...-Terra-27.html
Nearest thing to balloon knobbies for a 27 incher around. Got good reviews too.
Cheap enough I might try a pair for grins in a couple of months.
Mike