SRAM, AXS E1 Powermeter Spider, Power Meter Crankset, Speed: 12/13, BCD: Direct Mount SRAM 8 Bolt, Black, Road

• 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.
•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
• AXS™ enabled for easy monitoring and firmware updates
• SRAM Model ID: PM-AXS-SPDR-E1