If you want to get the most out of your training data, the precision and reliability of the RED XPLR AXS power meter is just what you need. The spider design uses a proprietary system for attachment to the chainring, allowing for weight reduction and increased stiffness without compromising the ability to change the chainrings. The dual-sided power measurement system has an accuracy of +/-1.5%, even in changing weather conditions, and offers unbeatable battery life.