Here is a cool new iPhone gadget for all you bikers out there. The Heart Rate Watch Company has released the iPhone 4S ultimate bike pack, turning your iPhone into a personal GPS bike computer. It gives you speed, distance, heart rate, and maps on a convenient bike mounted display.

The device works with a blue tooth chest strap to monitor your heart rate at all times. It is rumored they are working on a cadence sensor to monitor your real time pedal pushes, though it is not available now.

You install the iPhone in a protector case that attaches to a bike mount that includes an extended battery pack. The battery pack lets you use your iPhone 3 times longer, perfect for running the battery draining GPS programs on long trips.

The mounting hardware that comes with it, lets you attach it to your bike’s stem or handle bars, allowing continuous hands free use while biking.

“The iPhone 4S ultimate bike pack turns your iPhone 4S into a great bike computer that will rival most any bike computer,” says Rusty Squire, President of the Heart Rate Watch Company. “It offers unrivaled features and protection for your iPhone and if you are bringing it on your rides anyway then you might as well make use of it.”

I am not an avid biker, but this cool gadget kind of makes me want to take up the hobby. The mounting kit alone makes it a nice tool for listening to tunes while staying in shape. The portable battery pack has obvious uses outside of biking, and the bluetooth heart rate monitor is good for people trying to get in shape, regardless of the exercise. If you are an avid biker and you take your phone everywhere anyway, this thing makes perfect sense.