Sram Red Threadmount Power Spider

Threaded Precision. Wireless Insight.

The Sram RED Threadmount Spider is a dual-sided power measurement system that integrates seamlessly into your 1x drivetrain. By moving away from traditional bolts to a threaded mount design, Sram has increased the structural rigidity of the chainring-to-crank interface, ensuring that every watt is captured with surgical precision. Whether you are grinding through a mud-soaked CX race or contesting a gravel sprint, this spider provides the data you need to master your performance.

Why the RED Threadmount Spider is the Pro's Choice:

• Proprietary Threaded Interface: This revolutionary design allows for lighter and stiffer chainring mounting. It enables you to swap chainrings (from 38T to 46T) in minutes without the weight and complexity of traditional BCD bolts.

• MagicZero™ Automatic Calibration: Forget the "pre-ride zero" ritual. MagicZero technology continuously monitors and recalibrates your power meter as you ride, ensuring your data is accurate from the first pedal stroke to the last.

• Dual-Sided Total Power: Measures total output from both legs with +/-1.5% accuracy. It also provides Left/Right power balance data, helping you identify and correct pedaling inefficiencies.

• 10K Temperature Compensation: High-altitude mountain passes or freezing morning starts won't skew your data. The internal programming compensates for over 10,000 temperature points to keep your readings consistent.

• Exceptional Battery Longevity: Powered by a user-replaceable CR2032 battery, providing over 200H of ride time. No proprietary cables or charging ports to worry about. Just reliable, long-term power.

• AXS™ Ecosystem Integration: Fully compatible with the AXS app for easy firmware updates and data monitoring. It transmits simultaneously via Bluetooth Low Energy and ANT+ to any modern head unit.

Technical Specifications:

• Interface: Sram 8Bolt Crank Mount

• Chainring Mount: Sram Thread Mount (Proprietary)

• Accuracy: +/- 1.5%

• Battery: CR2032 (200-hour life)

• Connectivity: Bluetooth and ANT+

• Waterproofing: IPX7 (1m for 30min)

• Weight: Ultra-lightweight Spider Design (~112g)

The Alegro Perspective: Traditionally, if you wanted the accuracy of a spider-based power meter, you had to deal with the weight of a heavy BCD interface. The Threadmount design changes the game. It’s so light and stiff that you’re essentially getting pro-level data for "free" in terms of weight. If you’re already running Sram RED E1 crank arms, this is the most logical and impactful upgrade you can make to your training arsenal.

Stiff. Light. Accurate. Master your Watts with Sram RED.