Thomson Covert Dropper Internal Routed Seat Post (150mm Travel) (30.9mm x 400mm)

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Thomson Covert Dropper posts are built for bikes that utilize internal housing and cable routing for dropper posts. Housing and cable exits the bottom of the post and does not move when the post moves.

You want the increased control a dropper post gives you, but you had to give up your Thomson post to have it. Not any longer. You can put your Thomson post back on the bike! Our cartridge-based system is designed to have the longest service life in the industry. If repair is needed it is fast, affordable, and simple. Every single component is the best available. Custom made Norglide bearing bushings, custom made Trelleborg O-Rings and seals, Thomson saddle clamps and fasteners, Motul Oil. This is the drop post good enough to be called a Thomson Elite.


  • The return speed is damped in the last 15mm of upward travel to be gentle on your seating area.
  • 4 inches/100mm , 5 inches/125mm, or 6 inches/150mm of infinite travel. The dropper has 5mm of setback.
  • Overall weight is 592 grams including remote lever, housing, and cable. Our droppers pass EN fatigue and strength tests for seatpost. Lighter dropper posts do not!
  • Thomson droppers have the smallest most ergonomic remote lever available and short throw for quick height changes.

Weight: 450g
Length: 400mm
Offset: 5mm
Diameter: 30.9
Travel: 150mm
Clamp Style: Std Rails
Lockout: Handlebar Remote
Cable Routing: Frame Internal

This product was added to our catalog on September 9, 2016.