Sram Spider Red E1

When you need the absolute best from your training data the accuracy and reliability of the red xplr axs power meter is the way to go. The spider design uses a proprietary thread-on chainring mount system which allows us to reduce weight and increase stiffness without compromising the ability to swap rings. A dual sided power measurement system it’s accurate to +/-1.5% even as weather conditions change and boasts unbeatable battery life. - thread mount design is light stiff and accurate and available in 38t-46t - +/- 1.5% accuracy - user replaceable cr2032 battery with 200-hour battery life - bluetooth low energy technology and ant+ wireless data transfer - magiczero automatically checks and recalibrates your power meter as you ride - no cadence magnet required - 10k temperature compensation - waterproof (ipx7 waterproof to 1 meter for 30 minutes) - axs™ enabled for easy monitoring and firmware updates