Elevn Extender Aero 25.4mm

Product Overview

The Elevn Extender Aero 25.4mm is a 495mm aluminum recovery seat post extension designed exclusively for Chase aero-tube frames. With 325mm of extension, it allows riders to achieve extended, comfortable seating positions for warmups, cooldowns, and casual riding on ultra-low race geometries without replacing their primary race setup.

Key Features

• Aero tube geometry — Engineered specifically for Chase aero-shaped seat tubes; incompatible with round tube frames
• Extended length design — 495mm total length with 325mm extension provides significant seat height range beyond factory race posts
• Recovery-focused positioning — Enables comfortable seated posture for post-race recovery and casual riding between sessions
• Aluminum alloy construction — Lightweight material maintains minimal weight addition while providing adequate rigidity
• Aero clamp compatibility — Requires a separate 25.4mm aero seat clamp (sold separately) for secure installation

Technical Specifications

• Material: Aluminum alloy
• Seat post diameter: 25.4mm aero
• Total length: 495mm
• Extension: 325mm
• Seat clamp type: Aero 25.4mm (not included)
• Finish: Anodized (standard Elevn)

Compatibility and Ideal Use Cases

Exclusively compatible with Chase aero-tube frames: RSP 5.0, RSP 4.0, and RSP 3.0 in Mini, Junior, and Expert sizes. Essential for race riders using these frame models who need extended seating positions for recovery and casual riding. Requires purchase of a compatible 25.4mm aero seat clamp for installation.