Apple Bicycle Accessory.

"Apple has applied for a patent for a bicycle accessory concept. The patent application, which was published by the US Patent & Trademark Office on August 5, highlights Apple's concept for what they are calling a 'Smart Bike'. The bike patent application, which Patently Apple likens to a Nike + for cyclists, details a system which would allow bike riders to log and wirelessly share information about cycling routes."

Text from here.