With a power sensor located on the inside of both crank arms, the power meter can measure power from each leg individually. The 4iiii is extremely lightweight, adding approximately 20 grams to the Shimano R8100 crankset. Please note - this power meter is only compatible with Shimano Ultegra 8100 52/36 chainrings.This power meter is compatible with 2×12 road drivetrains and 24 mm Shimano bottom brackets. However, it can be used on any road bike as long as its 2×12 with a 24 mm bottom bracket. See Compatibility tab for more information.
This 4iiii power meter has a power sensor on both crank arms and measures power from both legs. It is also able to measure your left vs. Dual-leg power measurement, can measure left vs. See Specs tab for more information. This is a great option for customers with a Shimano R8100 drivetrain that want to keep an OEM R8100 crankset on their bike but add power.
Options For This Power Meter. This power meter is compatible with 2x12 road drivetrains and 24 mm Shimano bottom brackets. However, it can be used on any road bike as long as its 2x12 with a 24 mm bottom bracket. This power meter is only compatible with Shimano Ultegra 8100 52/36 chainrings. Crank-arm based power meters like this one attach a sensor on the inside of the left crank arm.
On some bikes, there is not enough room between the left crank arm and the chainstay for the sensor to clear the frame. Therefore, you should make sure you have at least 10 mm of clearance between the left crank arm and the chainstay - and that you don't have a bottom bracket mounted rear brake (used on some aero and TT bikes). The important area to measure is right in the middle of the crank arm. Please refer to the image below. If you find that you have around 7-9 mm of clearance, what many people will do is simply install a 1 or 2 mm bottom bracket spacer (between the left crank arm and the frame), which will give them the clearance they need.
4iiii Dual-Sided Power Meter Crankset. 2 CR2032 coin cell batteries.
4iiii PRECISION 2 PRO R8100. Left or Both Legs Measured. 694 grams (170 mm, 50-34T). Expert advice and customer service in case you need any help. At Power Meter City, we focus on power meters and related accessories and components.
Our focus on these products means we can offer you the best possible selection, advice and service. We have been in business since 2016 and are based in southern California. We are an authorized dealer of every product we sell.
This item is in the category "Sporting Goods\Cycling\Bicycle Electronics\Power Meters". The seller is "powermetercity" and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South Africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Republic of Croatia, Malaysia, Brazil, Chile, Colombia, Costa Rica, Panama, Trinidad and Tobago, Guatemala, Honduras, Jamaica, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Ecuador, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Vietnam.