Upgrade your Shimano 105 crankset with 4iiii’s most advanced power meter yet. The Precision 3+ is trusted by pros and everyday riders for its accuracy and reliability. Whether you’re chasing a Kona qualification slot, clocking up indoor miles, or hunting local KOMs, it delivers the data you need to ride smarter. With ±1% accuracy, auto terrain detection, up to 800 hours of battery life, and a 3-year warranty, it’s built to perform season after season.

Key Features

APPLE FIND MY

Offering the peace of mind in knowing where your power meter is.

AUTOMATIC TERRAIN SELECTOR

Detects the terrain you're riding on for more responsive cadence and power feedback/data. Ride the roads less travelled with confidence.

THREE-YEAR WARRANTY

A lot can happen in 3 years. You probably won't need to use it, but it's reassuring to know that all 4iii power meters are backed by an industry-leading 3-year warranty.

BATTERY LIFE

With up to 800 hours of battery life, you won’t have to worry about changing your battery for years to come.

LIGHT WEIGHT

At only 9 grams, the PRECISION 3+ Powermeter weighs about the same as a sip from your water bottle.

Specifications

• Type: Non-drive-side
• Apple Find My: Yes
• Connectivity: ANT+ & Bluetooth Smart
• Accuracy (%): +/- 1
• Automatic Terrain Selector: Yes
• Cycling Metrics: Yes
• Battery: CR2032 coin cell
• Waterproof Rating: IPX7
• Cadence Range: 30-170 rpm
• Power Range (watts): 0-4000 
• Weight: 9 g
• Operating Temp. (°C): 0-50
• Storage Temp. (°C): -40-60 
• 3 Year Warranty: Yes