S&M Long Johnson Stealth Pivotal Seat Post 27.2mm

The S&M Long Johnson 27.2mm is a redesigned, improved version of the Stealth Pivotal post with an updated base, sized for race frames and any other frame requiring a 27.2mm seat tube diameter. The 320mm length covers the full range from slammed low to comfortable seated riding height, and the Stealth Pivotal mounting system routes hardware access from below the seat for a clean, unobstructed seat surface. Compatible with both Stealth Pivotal and traditional pivotal seats.

Key Features

• Redesigned base — Updated base design on this version improves on the previous model's mounting interface for better seat stability and hardware engagement
• 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; uses a 5mm Allen wrench
• Reverse thread bolt — Stealth seat bolt uses reverse threading when tightened from below, preventing it from backing out under the rotational forces generated during normal riding
• Traditional pivotal compatible — Post can also be used with a standard pivotal seat for riders who do not require the Stealth system
• 320mm length — Provides enough adjustment range to run the seat at full riding height or slammed low without compromising safe minimum insertion depth
• 27.2mm diameter — Sized for race frames and other frames requiring the wider 27.2mm seat tube diameter
• Laser etched Sharpie Shield logos — Branding etched directly into the post rather than applied as decals, providing a durable finish that will not peel or fade

Technical Specifications

• Brand: S&M Bikes
• Model: Long Johnson Stealth Pivotal Seat Post
• Diameter: 27.2mm
• Length: 320mm
• Mount type: Stealth Pivotal — reverse thread, 5mm Allen from below
• Traditional pivotal compatible: Yes
• Weight: 6.85 oz
• Finish: Laser etched logos

Compatibility and Ideal Use Cases

Compatible with Stealth Pivotal seats and standard pivotal seats. Fits frames with a 27.2mm seat tube inner diameter — most commonly race frames. Riders on standard BMX frames with a 25.4mm seat tube should select the 25.4mm version instead. The reverse thread hardware requires noting during installation — tighten clockwise from below when using a Stealth Pivotal seat.