This is a tutorial showing how to secure the Stuff Sack Harness for a bombproof mountain bike setup. The trick is to find the right size stuff sack so that it will rest on your suspension fork (may work with some rigid forks as well). The Oval Dry Bags can be rotated to get different dimensions. Measure the distance from the bottom of your handlebars to the top of your fork crown and match that to either one of the base dimensions.