In this video I put the new SIGEYI AXO SL spider power meter through some solid testing out on the road, including around 15 hours of riding during the Festive 500, to see how it stacks up. While previous AXO units have tested well, this updated SL version revealed a major cadence-sensing issue that completely breaks sprint data, along with wildly inaccurate left/right balance estimates that make that metric unusable.