When we buy new device such as Trek 6i, 8i, 9i, 11i we often through away most of the documentation but the warranty.
Very often issues with Trek 6i, 8i, 9i, 11i begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Bicycle Trek 6i, 8i, 9i, 11i is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Bicycle on our side using links below.