You might have heard of the term 'granny gear' before. If you haven't, a granny gear is the smallest cog on the front crankset of your bike. If you haven't already become best friends with it, you may need to start! Your selected gear ratios for a touring bike depend on a number of factors: where you plan to travel, the terrain, your experience, how strong you are as a rider and, of course, how much gear you're lugging around. We recommend picking gears for all occasions, that is, having gears low enough to go up the steepest climbs, and also having gears high enough so you don't 'spin out' when the wind is on your side. The smallest chainring, the granny gear, is often the one you should worry about most. A good guide for touring bikes is to have a granny gear so small that riding in it works out to be the same speed as you walk. You can never have a gear low enough on a touring bike! Part 1: Gear Range and Ratios 1.1 Gear Inches: Understand ...