VeloNews Road Road Gear GCN’s guide to selecting gearing for your bike Not sure whether to run a compact, sub-compact, or standard crankset? Puzzled by the myriad cassette sizes? Here's a simple guide to gears Facebook Icon Twitter Icon Email Icon Global Cycling Network explains how to choose the right chainring and cassette combination for your bike. Heading out the door? Read this article on the new Outside+ app available now on iOS devices for members! Download the app.