Please can someone tell me either (a) how to work out whether I have suitable gears, or (b) do the arithmetic for me and tell me - preferably (a) as I really ought to get the hang of this stuff. 3 front chainwheels at the front - 48,38 and 28 6 sprockets on the back, the smallest has 14 teeth and the biggest has 28. The wheels are 26 inches. (Best beloved is away for a couple of days. He tried to explain on the phone, but he tends to work in pictures rather than words, and apart from noting that the smallest chainwheel and the biggest sprocket have the same no of teeth giving a 1:1 ration, his explanation lest me no wiser) -- Debbie Urban Theology Unit, Sheffield Views expressed in this email are my own and are not necessarily those of the University of Sheffield or UTU.