Joined: Feb 2005
Posts: 625
Likes: 0
From: back on the dental floss ranch, wielding zircon encrusted tweezers
Bikes: Schwinn wrecked ol' Probe 1x2, 84 Bianchi Limited,Raleigh 20 folder,,Redline Conquest Pro,71-73 Gitane TdF,Gitane Grand Sport de Luxe,78 Raleigh Super Course
Depending on you tire and crank sizes, 42x16 42x15 is around 68 to 72 gear inches, respectively, a pretty good ballpark to start with.