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4iiii GRX Precision 3.0+ Power Meter

Original price £379.00 - Original price £379.00
Original price
£379.00
£379.00 - £379.00
Current price £379.00

In Stock | Estimated 3-5 Days Delivery

Crank Length: 170

Unlock next-level performance with the 4iiii GRX Precision 3.0+ Power Meter, the lightest, most advanced model in 4iiii’s line-up. Designed for serious gravel riders and endurance athletes, this left-side crank power meter delivers industry-leading accuracy of ±1%, while weighing just 9 grams more than a standard crank arm. Whether you’re pushing for personal bests, training on virtual platforms, or targeting podiums, the GRX 3.0+ gives you the tools to ride smarter and stronger.

With up to 800 hours of battery life, a built-in automatic terrain selector, and real-time measurement of power, cadence and calories, this single-sided power meter offers unmatched reliability and longevity. The GRX Precision 3.0+ seamlessly connects to your favourite cycling computers and apps via Bluetooth Smart and ANT+, ensuring consistent data across indoor and outdoor rides.

The standout feature? Apple Find My integration. When not in use, the power meter appears on your Find My app so you’ll never lose track of it—making it as practical off the bike as it is on it. Paired with 4iiii’s industry-leading 3-year warranty, this compact, waterproof, and rugged power meter is an ideal upgrade for Shimano GRX cranks and gravel bikes.

Key Features

  • Accuracy: ±1% power measurement (single-sided – left leg only)
  • Battery Life: Up to 800 hours on CR2032 coin cell
  • Compatibility: Shimano GRX crank arms (factory-installed)
  • Connectivity: Dual ANT+ & Bluetooth Smart
  • Apple Find My Enabled: Locate via iPhone, iPad, Mac, or Apple Watch
  • Data Output: Watts, cadence, calories
  • Water Resistance: IPX7-rated (ride in any weather)
  • Firmware Updates: Wireless via 4iiii app
  • Added Weight: ~9 grams
  • Terrain Optimisation: Automatic terrain selector for consistent readings
  • Warranty: 3-year manufacturer’s warranty

Accuracy: ±1% power measurement

Battery Life: Up to 800 hours

Battery Type: CR2032 coin cell (user-replaceable)

Connectivity: ANT+ & Bluetooth

Weight: Adds only 9g to the crank arm

Waterproof Rating: IPX7 (water-resistant in up to 1 metre of water)

Compatibility: Shimano XT, XTR, and GRX crank arms

Automatic Terrain Selector: Adjusts readings for different riding surfaces

Power Data: Measures watts, cadence, and calories

Device Integration: Works with all major cycling computers and apps

Apple Find My Support: Locate your power meter via iPhone, iPad, Mac, or Apple Watch

Warranty: 3-year industry-leading warranty

Welcome to North Sports! We are delighted to offer free UK delivery for orders over £50.

When a purchase is complete tracking information will be sent to you, if available, at the earliest.

Delivery Courier Services

Your delivery will usually be carried out through the distributor's own courier service. This is to help speed up deliveries for our customers.

Deliveries are Monday-Friday and the courier might be able to deliver on Saturday's for an additional cost.

Our ordering team will always request the courier contacts you on the day of delivery to advise they're on route but please note the driver contacting you is not guaranteed and we only request that this happens.

Pre-Assembled Ready To Ride Delivery

Throughout the website there are selected products with the product option to have pre-assembly for an additional cost.

Next Day Delivery

Next Day delivery is subject to availability. Please contact us prior via email for us to confirm if this option is available.

Returns

If you've changed your mind about keeping your purchase please email returns@northsports.co.uk, within 14 days from receipt of delivery ensuring you quote your order number. Want to know more? Please visit our full returns page here.

Why Buy From North Sports

Free UK Delivery £50+

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