The Lightest Power Meter On The Market
Used to pace attacks up the Alpe D'Huez in the Tour de France, the 4iiii Ultegra 8000 Precision 3 Powermeter delivers industry-leading accuracy and reliability when you need it most. 4iiii's patented 3D Strain Gauge technology assures that the data you depend on will help lead you to your own Yellow Jersey.
Packaged into a durable lightweight design and compatible with ANT+ and Bluetooth Smart headunits, the Precision 3 will help you train harder and smarter.
A ride-ready 4iiii Precision 3 includes and comes preinstalled on a brand-new Ultegra 8000 left-side crankarm, compatible with bottom brackets using the Hollowtech II interface.
Whether you are fighting for a Kona slot, spending countless hours on the indoor trainer or striving for a personal best — one thing is clear, success takes time. With up to 800 hours of battery life, +/-1% accuracy and weighing in at only 9 grams, the Precision 3 Powermeter will be your trusted training tool for years to come.
- Hollowtech II left side crank arm with built-in 4iiii power meter
- +/- 1.0% accuracy lets you collect training data with confidence
- Accelerometer with gyroscope offers detailed cadence readings
- 9g design is one of lightest crank arm-based meters on the market
- 800 hours of battery life via replaceable CR2032 battery
- Pair to the 4iii app with ANT+ and Bluetooth SMART to transfer data
- Available in 165-175mm crankarm lengths
- Compatible with Ultegra 8000 series drivetrains
- Power range: 0-4000W
- Cadence range: 30-150RPM
- IPX7, IPX5 waterproof rated
- Sensor weight: 9g
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Mfg PartNum: PML300-S10A00J
Mfg PartNum: PML300-S10B00J
Great alternative to a full crank power meter. Easy to calibrated before your ride. No issues paring to my Garmin 530. Keep in mind that the single pairing transmits both power and cadence. Just remember to remove your old cadence sensor from you computer. Fit my 2021 Trek Emonda with plenty of room between the chain stay. Nice product and nice to have a standard type of battery that is easy to replace whenever that is needed.
In the past I've used Quark Powermeter in the spider on the crank and measuring both legs is better for a more exact rating, but now, as an old guy, I just wanted an idea of my applied power to see if I'm maintaining my strength, and just measuring one leg is sufficient for that. Couldn't pass up the on sale price ! Note: when installing, I had to use a 1mm shim between the crank arm and bottom bracket to stop possible rubbing on chainstay. Just seems like most bikes don't have enough room between crank arm and chainstay for strain gauge unit. Works fine now.