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Planet X Bikes

Selcof Watchtower Dropper Post

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The SELCOF WATCHTOWER cable actuated stealth dropper post allows you to get your saddle to optimal...

The SELCOF WATCHTOWER cable actuated stealth dropper post allows you to get your saddle to optimal height without having to stop to alter it, via its handlebar mounted lever.


  • Stealth Routing for a clean look
  • Trigger Style Lever
  • Easy installation


Perfect for riding technical off-road terrain, giving you space for maximum manouverability on the bike and better pedalling efficiency.


A dropper post is an essential mountain bike accessory and with the SELCOF WATCHTOWER cable actuated dropper post you’ll be attacking every climb with ease and conquering every descent confidently.


Smooth, fast and reliable cable actuation never skips a beat and makes installation a breeze with no special tools being required to fit and no fiddly hydraulic hose bleeding needed. Sealed cartridge internals provide excellent all-weather performance and a smooth seatpost movement, getting your saddle into the optimum riding position with ease.


The Trigger lever fits discreetly under your handlebars and has an ergonomic thumb paddle for a great performance and accessibility.


Available in 150mm and 125mm travel length, in both 30.9mm and 31.6mm diameter with a 3mm setback. Approx. Cable Housing Length – 2010mm


Which Size Dropper Seatpost do i need?


We advise when buying one of our bikes in size Small or X-Small, to purchase a 125mm travel length dropper post.


  • On-One Bootzipper -31.6mm
  • On-One Rocky Road - 30.9mm
  • On-One Whippet - 31.6mm
  • Titus El Viajero - 30.9mm
  • On-One Huntsman (inc Medium) - 31.6mm
  • Titus Silk Road - 30.9mm


On all our other bikes both a 125mm travel and a 150mm Travel Watchtower Dropper seatpost will fit.


To find out which dropper post fits any other bike please use the below Table 


Travel 125mm 150mm
Seat Collar to Center of Rails 180mm 210mm
Total Length 396mm 457mm
Min. Insertion Length 100mm 100mm
Max. Insertion Length (inc actuator) 210mm 246mm

From £154.99

Please, select a variant to continue

Please select a diameter and travel first
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