4iiii

4iiii PRECISION 3+ Shimano XTR

~~£479.00~~ £449.00 Sale

Shimano XTR left-sided power tracking with ±1% accuracy, low added weight and up to 800 hours per battery.

Crank Length: 170

170 175

Product variants

Quantity

In Stock | Estimated 3-5 Days Delivery Free UK delivery over £50

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30-day returnsView policy

Key Benefits

Track Trail Effort — Measure watts and cadence for pacing and training.
High Accuracy — ±1% claimed power measurement.
Low Added Weight — Approximately 9 g sensor weight.
Extended Battery Life — Up to 800 hours with a CR2032 cell.
Wireless Pairing — ANT+ and Bluetooth Smart.
Built for All-Weather Riding — IPX7 resistance for demanding conditions.

The 4iiii PRECISION 3 power meter for Shimano XTR provides a lightweight way to bring power measurement to high-performance mountain biking. The sensor is fitted to a replacement left crank arm, allowing riders to record watts and cadence for training, technical climbs and off-road races.

Its low-profile design adds approximately 9 g and delivers ±1% claimed accuracy, with ANT+ and Bluetooth Smart connectivity for compatible cycling computers and apps. A replaceable CR2032 battery offers up to 800 hours of use, while IPX7 water resistance supports riding in changeable conditions.

Choose the correct crank length and verify the XTR crank model and frame clearance. If you require Apple Find My functionality, please check the exact product generation with us before purchase.

Technical Specifications

Crank family: Shimano XTR left-side replacement crank arm
Available crank lengths in Shopify: 170 and 175 mm
Measurement: Non-drive-side, left crank arm
Power accuracy: ±1%
Connectivity: ANT+ and Bluetooth Smart
Battery: Replaceable CR2032; up to 800 hours
Power range: 0–4,000 W
Cadence range: 30–170 rpm
Water resistance: IPX7
Power-meter weight: Adds approximately 9 g
Sensor profile: 5.5 mm
Warranty: 3 years
Apple Find My: Not included on original PRECISION 3 (non-plus) models

Suggested Use & Compatibility

Suited to XC racers and mountain bikers riding a compatible Shimano XTR crankset. Replace the left crank arm with the correct model and length; do not assume XT and XTR crank arms are interchangeable. Check spindle interface, crank model and frame clearance before purchase. Works with compatible ANT+ and Bluetooth Smart devices and training software. Apple Find My should only be listed if the precise 3+ generation is confirmed.

Why We Choose 4iiii

We choose 4iiii because they’re at the forefront of cycling innovation, delivering world-class power meters and performance technology trusted by both pro teams and everyday riders. Their mission aligns with ours: making advanced training tools accessible, accurate, and reliable for all athletes.

Proven Accuracy – +/-1% precision power measurement for trusted performance data.
Innovation-Driven – Pioneers in lightweight, compact power meter design.
Ride Ready – Durable, weatherproof tech built for real-world cycling conditions.
Trusted by Professionals – Used by elite WorldTour cycling teams worldwide.

That’s why 4iiii is part of the North Sports collection — giving riders the tools they need to train smarter, push harder, and achieve their goals.