Joined: Aug 2005
Posts: 1,111
Likes: 1
From: Miles from Nowhere, Columbia County, OR
Bikes: 1980 Schwinn World Sport, 1982 Schwinn Super Le Tour, 1984 (?) Univega Single Speed/Fixed conversion, Kogswell G58 fixed gear, 1987 Schwinn Super Sport
FH,
With your chainwheel, crank length and tire size, a 17 tooth cog will give you 74.6 gear inches and an 18 tooth will be 70.5 gear inches. Given your terrain, I would go for the 17.
Dogbait