Magene QED Split Chainrings

Magene QED Split Chainrings are high-precision, ultra-light chainrings built for riders who want maximum drivetrain stiffness, fast shifting, and dependable durability. Constructed from 7075 aircraft-grade aluminium and weighing only 143g, they deliver race-ready performance without excess weight. Precision CNC machining ensures exact tooth shaping and consistent alignment, while Magene’s third-generation tooth profile improves chain engagement and shift speed under load. With 110 BCD 4-bolt compatibility and support for Shimano 11 and 12-speed groupsets, they integrate smoothly with modern drivetrains and Magene P505 power meter systems.

Key Features and Benefits:

• 7075 aircraft-grade aluminium construction: This high-strength aluminium alloy provides exceptional stiffness and resistance to abrasion and deformation. The result is efficient power transfer and long-term durability even under repeated high-load efforts.
• Ultra-light 143g total weight: The low overall mass reduces rotational weight at the crankset. This improves pedalling responsiveness and helps maintain an efficient cadence during accelerations and sustained climbs.
• FEA-based stress contour analysis: Finite element analysis identifies areas of high mechanical load and reinforces them with additional structure. This minimises flex under power and maintains stable drivetrain performance during sprints and heavy pedalling.
• Precision CNC machining process: Computer-controlled machining ensures consistent chainring thickness, accurate bolt interfaces, and exact tooth geometry. This delivers smooth chain engagement and reliable drivetrain operation across varied riding conditions.
• Third-generation tooth profile design: Redesigned tooth roots, grooves, and shapes guide the chain more efficiently between rings. This allows shifts from the small ring to the big ring in as little as one-fifth of a crank revolution, even when pedalling under load.
• 110 BCD 4-bolt mounting interface: This widely used bolt circle diameter ensures straightforward installation with many modern cranksets. It provides secure mounting and reliable alignment for consistent drivetrain performance.
• Compatibility with Magene P505 power meter systems: The chainring integrates directly with Magene P505 and PES P505 power meters. This maintains accurate power measurement while keeping the drivetrain compact and efficient.
• Extensive durability testing: The chainring is validated through more than 100,000 fatigue cycles and endurance testing exceeding 40,000 km. This testing confirms long-term structural integrity and dependable performance over extended use.

Efficient power transfer and reliable shifting remain key priorities for riders who demand consistent drivetrain performance. The QED Split Chainrings address these needs through a rigid 7075 aluminium structure, reinforced stress zones, and a refined tooth profile that maintains chain control under load. Precision machining ensures accurate alignment with compatible cranksets and power meter systems. This combination supports smooth drivetrain operation and dependable efficiency across long training rides, demanding climbs, and high-power efforts.

A drivetrain upgrade that reduces weight and improves shifting precision can make a measurable difference in overall efficiency. The Magene QED Split Chainrings provide a light, stiff, and precisely engineered solution that integrates smoothly with modern Shimano 11 and 12-speed systems and Magene power meters.

Specifications:

• 7075 aircraft-grade aluminium for ultra-light weight and high stiffness
• Only 143g total weight with exceptional durability
• FEA-optimised structural reinforcement to reduce deformation under load
• CNC precision machining for consistent quality and accurate tooth geometry
• 110 BCD 4-bolt compatibility
• Fully compatible with Magene P505 and PES P505 power meter systems
• Supports Shimano 11 and 12-speed groupsets (except Shimano-shaped cranks)
• Durability tested with over 100,000 fatigue cycles and 40,000 km endurance testing
• Weight: 143g (50-34T)
• Compatibility: Shimano 11 and 12 speed
• Bolt: 4 Bolt
• Chain Line: 45mm