4iiii Precision Shimano Ultegra 6800 Power Meter
Save 26% on the Precision Ultegra 6800 Power Meter by 4iiii!
4iiii Precision 105 6800 Power Meter
This unit comes pre-installed on a Shimano Ultegra 6800 left hand crank Improved Battery Life Extend your battery life up 100 hours with the latest Firmware upgrade. We've also made improvements that make allowance for general sensor vibration so you no longer have to remove your battery when transporting your bike. Battery Indicator Now you will be able to see how much battery life you have left when you're out on a ride. This battery alert will be transmitted to the 4iiii app as well as any ANT+ head unit paired with the PRECISION power meter. The percentage of remaining battery will tick down according to your sensor use. When your battery status shows as "low" status, you have about 20 more hours before it's time to finish your ride and change out the 2032 battery coin. For best results, use one battery until it reaches the 'low' mark and then replace with a new battery. Adjustment Scale Factor PRECISION's new advanced settings allow you to adjust PRECISION's output to account for a leg strength imbalance. It will also let you match PRECISION's output to that of another power meter. This feature was introduced to address the fact that PRECISION is (currently) a left-only power meter, and not everybody has a 50 / 50 left-right balance. Perhaps from training on some different equipment, you know that your left leg is actually weaker and you have a 45 / 55 left-right balance. Doubling the power from your left leg (as per PRECISION and all single sided power meters), gives you a total power of only 90% of what you're actually putting out. In order to adjust for this, you can simply set the scale factor to 50 / 45=1.11111. 50 because 50% is your desired reading for PRECISION (half of your total power output), and 45 because your left leg is actually only putting out 45% of your actual total power. This scale factor can also be used to match PRECISION's output to other training equipment you use. Improvements to Zero Offset These changes allow for robust and reliable handling of calibration values, providing accurate reading (+ / - 1%). Display Compatibility PRECISION's seamless connection to Sportiiiii and ANT+ compatible displays (watches, bike computers, etc.) lets you work with your choice of top devices from leading global brands.