SRAM's Most Accurate Spider-Based Power Meter for Eagle T-Type Transmission

The SRAM XX SL Eagle T-Type AXS Power Meter Spider is the highest-performance power measurement solution in SRAM's Eagle AXS ecosystem - an all-new spider-based design that SRAM describes as their most accurate and highest-performing power meter. The spider design uses a proprietary thread-on chainring mount system that reduces weight compared to alternative configurations without compromising the reliability and accuracy that defines a power meter's value for training and racing.

This is a spider-only component. It is specifically designed for use with XX SL Eagle T-Type Thread Mount chainrings, which are sold separately and must be compatible with the 8-bolt direct mount pattern. It is compatible with all Eagle Transmission 8-Bolt cranks. Confirm your crank and chainring compatibility before purchase - the Thread Mount system is specific to XX and XX SL Eagle T-Type components and is not universally compatible with all Eagle crank and chainring combinations.

• Specifically designed for use with XX SL Eagle T-Type Thread Mount chainrings (Sold separately)
• MagicZero - automatically checks and recalibrates your power meter as you ride
• Bluetooth low energy technology and ANT+ wireless data transfer
• AxCad -- no cadence magnet required
• Power readings are accurate within +/-1.5% and aren't affected by climate conditions during a ride
• AXS™ enabled for easy monitoring and firmware upgrades
• Compatible with all Eagle Transmission 8-Bolt cranks
• Waterproof (IPX7 waterproof to 1 meter for 30 minutes)
• Uses a common CR2032 battery that last for 200 riding hours and changes without tools

Dual-Sided Power Measurement, MagicZero, and +/-1.5% Accuracy

The power meter uses a dual-sided measurement system that calculates total watts by measuring power input from both the left and right legs independently. Dual-sided measurement provides not only total power output but also left-right power balance data - information that is valuable for identifying pedalling asymmetries that affect training quality and race performance, and for monitoring fatigue patterns that emerge when power balance shifts during long efforts.

Power accuracy is rated at +/-1.5% and SRAM states this accuracy is maintained regardless of climate conditions during a ride - temperature changes, humidity, and weather variations that affect some power meters do not compromise the reading accuracy of this unit. MagicZero is SRAM's automatic calibration system that continuously checks and recalibrates the power meter during riding without requiring the rider to stop and manually zero the meter between efforts. Automatic calibration eliminates the risk of data drift over the course of a ride that can occur when a power meter is only zeroed at the start of a session.

AXS Connectivity, Flight Attendant, ANT+, and Bluetooth

The power meter is AXS enabled - connecting to the SRAM AXS ecosystem for monitoring, data logging, and firmware updates through the AXS app. Flight Attendant compatibility integrates the power meter into SRAM's automatic suspension adjustment system, which uses power output data to adjust suspension settings in real time. For riders using a complete Flight Attendant equipped build, the power meter's data becomes an active input into the bike's suspension management rather than only a training metric.

Wireless connectivity uses both ANT+ and Bluetooth Low Energy simultaneously, providing data to compatible head units on either protocol without requiring a separate pairing process for each. AxCad is SRAM's cadence measurement system that calculates cadence without a cadence magnet - the spider-based design reads cadence directly without requiring any additional sensor installation on the bike.

The power meter is IPX7 waterproof to one metre for thirty minutes, covering rain, mud, and wet trail conditions without requiring waterproofing precautions. Battery life is 200 riding hours from a standard CR2032 coin cell battery - a common, widely available battery that is replaced without tools.

FAQs

What chainrings is the SRAM XX SL Eagle T-Type Power Meter Spider compatible with?

The spider is specifically designed for use with XX SL Eagle T-Type Thread Mount chainrings using the 8-bolt direct mount pattern. These chainrings are sold separately. Confirm your specific chainring and crank combination is compatible with the Thread Mount system before purchase.

What is MagicZero and how does it improve power measurement accuracy?

MagicZero is SRAM's automatic calibration system that continuously checks and recalibrates the power meter during riding without requiring a manual zero. This eliminates data drift that can occur over a ride when a power meter is only zeroed at the start of the session, maintaining consistent accuracy from the first pedal stroke to the last.

Does the power meter measure both legs independently?

Yes. The dual-sided measurement system records power from both the left and right legs independently, calculating total watts and providing left-right power balance data. This allows riders to monitor pedalling asymmetries and fatigue-related balance shifts that single-sided power meters cannot detect.

What is Flight Attendant compatibility and what does it enable?

Flight Attendant is SRAM's automatic suspension adjustment system. When the power meter is used in a complete Flight Attendant equipped build, its real-time power output data becomes an active input into the system's suspension management - adjusting suspension settings automatically based on riding effort rather than only responding to terrain input. This allows the suspension to transition between modes without any rider input during dynamic riding.

How long does the battery last and how is it replaced?

The CR2032 coin cell battery provides 200 riding hours of power meter operation. The battery is a common, widely available size that is replaced without tools - making battery changes straightforward in the field or at home without requiring specialist equipment or workshop time.