To install the Wahoo Bike Mount use the cable ties that were supplied in the packaging to secure the mount to the stem or handlebars of your bike. We recommend mounting on the stem if possible for maximum stability.
The mount consists of 2 pieces and the top piece can be arranged so that the case mounts portrait or landscape. Make sure the screw that holds the two mount pieces together is tightened all the way once you choose your orientation.
Then slide the case onto the mount making sure that the locking tab is securely in place in the center of the case. Make sure that you select the insert that corresponds to the type of phone you have-- there is one insert that fits the iPhone 3 and 3GS and one insert for the iPhone 4 and 4S.
This video can give you more information on the bike case and how to mount it:http://www.youtube.com/watch?v=knNJdN00ras&list=UUvZevznlxXO111...