Giant Power Pro Ultegra R8100 Power Meter: Dual-Sided, 100 Hours (£800)
The Giant Power Pro Ultegra R8100 is a dual-sided, crank-arm power meter for Shimano Ultegra R8100 cranks. We have not tested it. This page collects what Tredz lists and the current price.
Available now: Giant Power Pro Ultegra R8100 Power Meter — £799.99 at Tredz (listed RRP £799.99), correct at time of writing, 19 October 2026.
What the retailer lists
- Sensing: sensors in both crank arms, with six-axis gyro sensors that Giant says filter ground-surge vibration on rough surfaces.
- Accuracy: within +/- 2%, with automatic temperature calibration.
- Battery: lithium, up to 100 hours per charge, one hour to charge.
- Water: IPX7.
- Connectivity: Bluetooth and ANT+.
- Data: power from 0 to 3,000 W, cadence 20 to 200 rpm, left-right balance and pedalling efficiency.
- Chainrings: 50/34t or 52/36t, with crank arms from 160 to 175 mm.
- Warranty: two years.
Where it fits for triathletes
The points below are our reading of the listed features, not test results.
- Training with power. A dual-sided meter gives both legs’ output for pacing a bike leg.
- Specific fit. It is for Shimano Ultegra R8100 cranks, so check your groupset and crank length first.
Where to buy
Tredz lists the Giant Power Pro Ultegra R8100 Power Meter at £799.99 at time of writing, and the link below goes to the same product page.
Related guides
See also our best power meters guide and our pedal vs crank power meter guide.
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