I used a power meter to train for Gravel Burn and swear by the results - this 20% off Black Friday special from 4iii is one of the best deals I've found

If you want to improve your fitness, efficiency, and pacing, I highly recommend the power meter range from 4iii

4iii
(Image credit: 4iii)

For my recent training leading up to Gravel Burn, I switched between two power meters depending on the training day – a spider-based option fitted to my Cannondale Super X gravel race bike and a 4iii crank-based system on the bike I used for indoor cycling.

This Black Friday, the Canadian-based company is running a 20% off deal across its complete crankset and single-sided model range, including options for Shimano Dura-Ace, Ultegra, XTR, and TRP Evo 12 cranksets. Crankarm options include a wide range of brands and models from Shimano, SRAM, FSA, Cannondale, and TRP.

Training with a power meter is incredibly beneficial for monitoring training adaptations, load, and fatigue over time, allowing you to track your form and predict when you'll reach peak form. As a tech writer, I have access to many power meters – not only do most of our test bikes come pre-fitted with power meters, but as a competitive cyclist and elite eSports racer, I always need a secondary power meter to validate performances on Zwift and MyWhoosh. This means I've tested almost all of the popular options.

4iii Precision 3+ PRO Dual for Shimano Dura-Ace
Best US deal
Save 20%
4iii Precision 3+ PRO Dual for Shimano Dura-Ace: was $549.99 now $439.99 at shop.4iiii.com

With up to 550 hours of battery life, an automatic terrain selector, +/-1% accuracy, and backed by our industry-leading three-year warranty, the Precision 3+ PRO power meter is a no-brainer.

4iii Precision 3+ Power meter crankarm for Shimano Ultegra
Best US deal
Save 21%
4iii Precision 3+ Power meter crankarm for Shimano Ultegra: was $339.99 now $269.99 at shop.4iiii.com

The Precision 3+ Power meter crankarm gets an impressive 800 hours of battery life, an automatic terrain selector and claimed accuracy deviation of +/-1%.

4iii Precision 3+ PRO Dual for Shimano Dura-Ace
Best UK deal
Save 21%
4iii Precision 3+ PRO Dual for Shimano Dura-Ace: was £659.99 now £519.99 at shop-uk.4iiii.com

With up to 550 hours of battery life, an automatic terrain selector, +/-1% accuracy, and backed by our industry-leading three-year warranty, the Precision 3+ PRO power meter is a no-brainer.

4iii Precision 3+ Power meter crankarm for Shimano Ultegra
Best UK deal
Save 21%
4iii Precision 3+ Power meter crankarm for Shimano Ultegra: was £339.99 now £269.99 at shop-uk.4iiii.com

The Precision 3+ Power meter crankarm gets an impressive 800 hours of battery life, an automatic terrain selector and claimed accuracy deviation of +/-1%.

With 4iii, you really can't go wrong ordinarily, but with this discount, it's pretty amazing. The brand is offering 20% off all new factory-fitted power meters across its site this Black Friday, so it's worth browsing the deals section to see what is available.

Alternatively, if you're looking for deals on other cycling-related components, bikes, tyres, cycling computers, smart trainers, and more, make sure you take a look at our main Black Friday deals page, where our in-house experts have collected more than 100 of the best offers

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Aaron Borrill
Tech writer

Aaron is Cycling Weekly's tech writer. As the former editor of off.roadcc, tech editor of Cyclingnews and Bike Perfect, digital editor of Bicycling magazine and associate editor of TopCar, he's travelled the world writing about bikes and anything with wheels for the past 20 years. As a racer, he's completed stage races such as the Cape Epic, Berg and Bush, W2W, and Gravel Burn. On the road, he’s completed the Haute Route Alps, represented South Africa at the UCI Gran Fondo World Championships Road Race and Time Trial and is an accomplished eSports racer, too - having captained South Africa at the 2022, 2023 and 2024 UCI Cycling eSports World Championships.

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