High-Tech Test Ride: Cycling Gear With Brains - WSJ.com

Check here for some product snapshots

"It shouldn't surprise anyone that smartphones are transforming the bike ride. The minuscule sensors in my iPhone can tell me things that, not long ago, would have required expensive equipment and wires dangling from my bicycle. But it's not just about apps. Bikes (and cyclists) provide ample real estate to strap or glue on just about any type of contraption you can imagine, and tech companies are racing to fill every bare patch of carbon fiber or skin."

High-Tech Test Ride: Cycling Gear With Brains - WSJ.com