BioLogic Bike Mount for iPhone 4
If your friends and/or family members enjoy bike riding, consider the Bike Mount for iPhone 4. It keeps an iPhone 4 or 4S safely mounted on the bike's handlebars, and makes it easy to keep track of stats, stay on course and stay in touch.
The Bike Mount features a tough, weatherproof polycarbonate case on the outside and is lined with silicone inside for shock absorption. There are windows in the case for the front and rear cameras, and the iPhone can be operated normally via a touch-sensitive membrane that protects the screen. The case attaches to bike handlebars with a diameter of up to 1.5 in. and can rotate from portrait to landscape mode.
Available for $50 from Biologic.