PNW Coast Suspension Dropper Post


SKU: PNWSUDP Categories: , , Tag:

The Coast dropper is the world’s first Suspension Dropper Post, combining ride smoothing suspension and the benefits of a dropper into one seat post. This dropper is designed to help riders on all types of bikes, from packed up trekkers, to the cross country wanderers, even the weekday commuters.


Our inspiring review is coming soon, for now here is what PNW has to say:

We developed the Coast because the earth isn’t flat (no matter what those people on twitter say), it’s kind of bumpy. And while we all like coasting along on freshly paved roads, mountain paths are enticing and potholes exist no matter how much we swear at them. The Coast Post was designed to soak up some of these vibrations. We accomplished this via 40mm of tunable air suspension housed in the internals to make your ride a bit smoother.

While this post provides some relief from everyday chatter it also comes with up to 120mm of drop. Most people associate dropper posts with mountain biking, but it turns out they’re pretty jazzy on everything from gravel bikes, to trekking rigs and commuters. Let’s face it, when your saddle is not at the proper height dismounts can be… inelegant. A dropper post allows you to push a button and be in a flat footed position when you want, easily returning you to the best saddle height for riding once you get going again. This can be great for starting and stopping in city traffic, or getting on and off a bike packed up with stuff – or really, if your hips are just extra tight and creaky like ours.

Plus when you’re going downhill, a dropper easily gets the distraction of your seat out of the way, letting you lower your center of gravity. Not only does this put you in a safer riding position it also makes descents more fun (we wish this safer-but-also-more-fun combo was true for more things in life). 


  • Cable Routing: Available with internal or external cable routing
  • Cartridge: 2-chamber hydraulic and adjustable air
  • Perfect for commute, gravel or hardtail bikes
  • Find the External Coast installation manuals here
  • Find the Internal Coast installation manuals here
  • NOTE: This is NOT a replacement for rear suspension, it is a suspension seat post which helps absorb the larger bumps while seated. It does not provide small bump compliance found in rear suspension mountain bikes.


Shared specs for all sizes:

  • Air Suspension: 40mm

External 27.2/100mm

  • Diameter: 27.2mm
  • Drop Travel: 100mm
  • Weight: 540g

Internal 27.2/100mm:

  • Diameter: 27.2mm
  • Drop Travel: 100mm
  • Weight: 535g

 External 30.9/120mm:

  • Diameter: 30.9mm
  • Drop Travel: 120mm
  • Weight: 615g

Internal 30.9/120mm:

  • Diameter: 30.9mm
  • Drop Travel: 120mm
  • Weight: 610g



All PNW Components products are backed by warranty against defects in material and manufacturing.

Please see our Warranty page for the details of our warranty process as well as additional information regarding the PNW Components warranty policy.

Customer Reviews
5.0 Based on 2 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Customer Photos
Write a Review

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
Tim R.

Toby Rocks!

Bought a bike on consignment at Campfire Cycling and had Toby install a dropper post. Super fast and friendly! Great shop!

Dan M.
United States (US) United States (US)

Very nice post !

The suspension feature is not something most mtb riders will be used to or necessarily like, but it works well and makes the hardtail feel a little like full suspension! Regular dropper action works great, mates well to a cheapy thumb lever, and external routing is easy to install PNW Coast Suspension Dropper Post PNW Coast Suspension Dropper Post Review