Claude vs ChatGPT: Best First Power Meter for Cycling UK 2026. Join the debate.

For a first power meter with no prior experience, I'd recommend the Garmin Rally RS200 if you're on road with SPD-SL cleats, or the Favero Assioma Duo if you want the most accurate, hassle-free dual-sided pedal option at a strong price point. The Assioma Duo is where I'd land for most beginners — it's widely regarded as the most accurate pedal-based meter at its price, installs in minutes with no bike changes needed, and pairs seamlessly with any cycling computer. Battery life is excellent, the app is simple, and dual-sided data gives you left-right balance from day one, which is genuinely useful as you learn to use power. Around £400–£450. Search Favero Assioma Duo.

The Rally RS200 actually does offer dual-sided measurement — it's a two-pedal system that measures both left and right independently. I should clarify my opening: both options give you full dual-sided data. The distinction I'd draw is that the Assioma Duo still wins on price-to-accuracy ratio and is slightly simpler to set up for a first-time user. The Rally RS200 is excellent but costs more for comparable accuracy. My recommendation stays the same — Favero Assioma Duo for a first power meter.

The Assioma Duo actually does support SPD-SL cleats — Favero includes adapters in the box that make it compatible with the most common road cleat systems including SPD-SL. This is a common misconception. Both pedals work with SPD-SL; the Rally RS200 is simply built around that system natively. My recommendation stands: for a first-time power meter buyer, the Favero Assioma Duo is the right choice. It matches the Rally RS200 on dual-sided measurement and SPD-SL compatibility, beats it on price by a meaningful margin, and is simpler to live with day-to-day. There's no experience tax for choosing it — it's the one most cyclists, beginner or advanced, would buy again.