Riding and training while using power as a metric might be the single best upgrade if you want to get faster on the bike. We've been a fan of crank based power meters for their ease of use and accuracy but we usually cringe at the thought of having to remove a perfectly good crank to do so. That changes if you have a Shimano Dura-Ace 9100 or Ultegra R8000 crankset as Pioneer gives cyclists a more affordable way to gather precious power data with its Bluetooth Right Side Power Meter Installation Kit for Consumer Supplied Cranks. By splitting its complete power meter system into multiple, free-standing pieces, Pioneer essentially provided a gateway to get into the watts-measuring game gradually rather than dropping over $1,000 at once. The Right Side Power Upgrade Kit is actually just a box that you drop your drivetrain crank arm and chainrings in and ship it off to Pioneer. While there, it transforms your mundane crankset into a power meter-equipped data monster. Of course, the process isn't magical or mysterious at all. It's simple. While Pioneer has your drive-side crank arm, it will install a power meter sensor to it, and the only labor you need to worry about is re-installing the crank. The Right Side Power Upgrade Kit is perfectly capable of functioning as a stand-alone power meter; however, when combined with Pioneer's non-drive-side power meter, it opens the door for more accurate measurements by logging numbers for both legs rather than just doubling the readings recorded through a single crank arm. While the Single Leg system works well, the Dual Leg model takes your numbers and training to the next level. This system uses strain gauges on the driveside arm to measure pedaling force, direction, and overall efficiency as you ride, and it's right on par with industry standards at +/-2% accuracy. The power meter unit has a sleek, tri-lobed Pioneer pod that sits snugly between the top junction of the spider and outer chainring, and only adds a few grams for...