Smart Tech
What is a Power Meter?
A sensor that measures exactly how many watts you're putting out.
Simplified schematic — not to scale.
In plain English
A power meter, usually built into the pedals, crank or hub, measures the actual force and speed of your pedalling to calculate your power output in watts.
A simple analogy
“If a torque sensor tells an e-bike motor how hard you're pushing, a power meter tells you — and displays the number, for training or bragging rights.”
How it works
Strain gauges flex minutely under pedalling force. Combined with cadence, that flex is converted into a wattage figure and sent wirelessly to your bike computer.
Signs of trouble
- ⚠Readings that jump around unrealistically
- ⚠Battery draining much faster than expected
- ⚠Left/right balance readings that don't add up
Rough UK cost
£300 – £1,200 depending on type
Always get a written quote. Prices vary by bike, region and parts brand.
Heads up: Bikeautonomy is for general guidance only. If your bike is behaving oddly or you're not confident, get it looked at by a qualified bike mechanic.