When you purchase through links on our site, we may earn an affiliate commission.

Reviews Sigma Onyx Pro

Sigma Onyx Pro

Sigma’s Onyx Pro is one of the cheapest HR monitors available, but the company with a strong track record cycling computers hasn’t skimped on the details. While the Onyx Pro may not be the sexiest object, it feels well built, with some quality materials and simple design.

As soon as you get your fingers on the buttons, you realise how intuitive and easy to navigate the user interface is. Choosing between standard training modes such as interval, endurance and even a special marathon setting couldn’t be easier. You can choose between using heart rate limits or entering your own anaerobic threshold for specific training zones, while the heart rate strap is coded so you shouldn’t get any overlap with training partners or competitors.

For a simple HRM, with all the standard functions and a few extras, you’ll find it hard to beat the Onyx Pro for price and quality.

Contact : Sigma 0208 943 4443 www.sigmasport.co.uk

Profile image of Matt Baird Matt Baird Editor of Cycling Plus magazine


Matt is a regular contributor to 220 Triathlon, having joined the magazine in 2008. He’s raced everything from super-sprint to Ironman, duathlons and off-road triathlons, and can regularly be seen on the roads and trails around Bristol. Matt is the author of Triathlon! from Aurum Press and is now the editor of Cycling Plus magazine.

Enable referrer and click cookie to search for eefc48a8bf715c1b 20231024b972d108 [] 2.7.22