S&M Long Johnson Stealth Pivotal Seat Post 25.4mm

The S&M Long Johnson is a 320mm pivotal seat post designed to cover a wide range of height adjustments — tall enough for comfortable seated riding and low enough to stay clear when needed. The Stealth Pivotal mounting system routes hardware access from below the seat rather than through it, keeping the top of the seat surface clean and unobstructed.

Key Features

• 320mm length — Longer than standard pivotal posts, providing enough adjustment range to run the seat at full riding height or slammed low without compromising insertion depth safety
• Stealth Pivotal mounting system — Allen wrench access comes from underneath the seat rather than through the top, eliminating the standard pivotal bolt hole in the seat surface for a cleaner look and uninterrupted seat top
• Reverse thread bottom bolt — The bolt uses reverse threading when tightened from below, preventing it from loosening under the rotational forces generated during normal riding
• Laser etched Sharpie Shield logos — Branding is laser etched directly into the post rather than using decals, providing a durable finish that won't peel or fade with use
• 25.4mm diameter — Sized for frames with a 25.4mm seat tube inner diameter

Technical Specifications

• Brand: S&M Bikes
• Model: Long Johnson Stealth Pivotal Post
• Diameter: 25.4mm
• Length: 320mm
• Mount type: Stealth Pivotal (reverse thread, bottom access)
• Weight: 6.85 oz
• Finish: Laser etched logos

Compatibility and Ideal Use Cases

Compatible with all standard pivotal seats. Fits frames with a 25.4mm seat tube inner diameter — confirm seat tube size before ordering. The 320mm length makes this particularly well suited to taller riders or anyone who needs genuine high-to-low adjustability from a single post. Reverse thread hardware requires noting during installation — tighten clockwise from below.