The Secret Weapon

BMC Autodrop is a fully integrated automatic dropper post designed to give riders instant saddle adjustment on the Fourstroke 01.

Its intuitive two-position system allows quick, squat-free seatpost drops while riding, helping riders stay focused and maintain momentum through technical sections.

The result is more speed, less fatigue, and improved lap times—delivering a crucial advantage when every second counts.

 

Strong and Light

Unlike conventional dropper posts built around round components, BMC Autodrop is purpose-designed for maximum performance. Its integrated design removes external compatibility limitations, allowing greater freedom in shape, size, and material selection.

The result is a lightweight, strong, and race-focused XC dropper post engineered for performance without unnecessary weight.

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Streamlined Design

Autodrop relocates the clamping system and its loads to the bottom of the seat tube, allowing for a lighter, cleaner seat tube design without a traditional seatpost clamp.

Its elliptical shape keeps the saddle perfectly aligned, while a simple dust wiper replaces the conventional clamp for improved durability and a cleaner appearance.

With fewer components, Autodrop delivers better performance, greater durability, and a streamlined design.

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30% Stronger Than Conventional Posts

Autodrop’s elliptical design reduces loads on the seatpost sliding system by up to 30%, enhancing performance and reliability while allowing material savings for a lighter overall design.

Optimized wall thicknesses provide the ideal balance of strength, durability, and low weight, effectively managing rider-induced forces without unnecessary material.

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Over 100g Lighter

Autodrop is over 100g lighter than conventional dropper seatposts, thanks to its elliptical shape and fully integrated design.

By eliminating the limitations of traditional round components, Autodrop allows greater freedom in shape, size, and material selection—resulting in a lighter, stronger, and more performance-focused XC dropper post.

Less weight. More performance. Built for XC.

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Adjustable Fit

With 90 mm of seat-height adjustment, Autodrop provides a precise fit for a wide range of riders. The system offers four frame sizes, with easy saddle-height adjustment similar to conventional seatposts.

  • Small: 655–745 mm
  • Medium: 700–790 mm
  • Large: 740–830 mm
  • Extra Large: 770–860 mm

90 mm of adjustment. Four sizes. A precise fit for every rider.

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