Product Information
About
Seatpost Upper Piston Assembly - 30.9/31.6, 100mm - (Includes Upper Piston/Valve, Shaft) - Reverb AXS B1+ (2026+)
Constructed from durable, lightweight materials that resist wear and corrosion, enhancing longevity and maintaining optimal functionality in demanding cycling conditions.
Engineered with advanced hydraulic valve technology and precision shafts, providing smooth, reliable height adjustments with minimal effort and consistent performance over time.
Ideal for trail, mountain biking, and enduro applications where reliable suspension and responsive seatpost movement are critical for rider confidence and safety.
Features compatibility with 30.9mm and 31.6mm seatpost diameters, offering versatile installation options for compatibility with a wide range of bikes and custom builds.
Product Description
Boost your bike's performance with the RockShox Seatpost Upper Piston Assembly for Reverb AXS B1+ (2026+) - a precision-engineered component designed to optimize your dropper post's functionality. Crafted for durability, reliability, and seamless integration, this upper piston assembly ensures smooth, responsive actuation for confident riding across all terrains. Materials & Construction: Constructed with , corrosion-resistant metals, the RockShox Upper Piston features robust alloy components built to withstand the rigors of mountain biking. Its precision-machined shaft and valve components guarantee consistent performance and longevity, even in harsh environmental conditions. Performance & Engineering: This assembly includes the essential upper piston/valve and shaft, engineered specifically for the Reverb AXS B1+ model. It plays a crucial role in maintaining optimal hydraulic pressure, ensuring buttery-smooth suspension operation and reliable dropper post actuation. The 250mm length and compatibility with 30.9/31.6mm seatposts make it an ideal upgrade for enhancing saddle height adjustability. Components & Technology: Designed for the latest Reverb AXS B1+ dropper posts, this piston assembly integrates seamlessly with wireless electronic controls, delivering precise, automated saddle movement. Its advanced sealing technology prevents fluid leaks and contaminants, safeguarding your suspension system. Style & Use Case: Perfectly suited for enduro, trail, and XC riders seeking dependable performance, the RockShox Upper Piston stands out with its sleek design and engineering precision. Improve your bike's functionality with this essential upgrade, making saddle height adjustments quicker and more reliable during rides. Innovative Features & Differentiators: - Compatible with Reverb AXS B1+ (2026+) models for cutting-edge wireless performance - Engineered for quick installation and compatibility with 30.9/31.6mm seat tubes - Durable construction for extend
