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PNW Components
Coast Suspension Dropper IR Seatpost

4.666666666666667 out of 5 stars
3 Reviews
$189.00 - $199.00

Style & Size:


Coast Suspension Dropper IR Seatpost

Over the years we've seen suspension introduced into just about any component you can reasonably imagine, so at first when we heard the engineers at PNW Components announce a suspension seatpost, we weren't floored — that is, until we dug just a touch further, and found that the innovative brand took things a step further, providing 40mm of tunable air suspension into a dropper post, launching the Coast Suspension Dropper IR Seatpost. This unique post is designed to take the sting out of jarring forces, like a pothole that catches you around a corner, harsh curb, or rocks and roots on singeltrack. It's optimized for a whole slew of riding styles as well, whether you want to add comfort and dismount ease to your commuter, squish to your gravel rig, or adaptability to your bikepacking machine.

The post is built with the mechanics we've come to know and trust from PNW, and packs in 120mm of drop for getting behind the saddle (100mm on 27.2mm version). This provides plenty of space for moving around on the bike, and lowers your post to help achieve flat-footed dismounts, which are exceptionally handy with a fully-loaded bike that's packed for adventures. This partners up with 40mm of travel that eats up chatter, but won't claim to replicate the feel of a full-suspension rig. While a full-suspension moves your rear wheel to conquer square-edged bumps, and more than likely offers well over 40mm of travel, the post simply features a telescoping travel to make riding a little smoother when the going gets rough.


  • A dropper post that packs in air suspension to soften the ride
  • 40mm of fully tunable suspension damps hits from rocks and potholes
  • Available with 100-or-120mm of travel for comfort in the cockpit
  • Optimized to work with commuter, gravel, trail and enduro rides
  • Dropper posts improve ease of dismount with fully-loaded bikepacking rigs
  • Compatible with 27.2, 30.9, and 31.6mm seat tubes with internal cable routing
  • Does not include remote for actuating dropper
  • Item #PNW0013
27.2mm, 30.9mm, 31.6mm
[27.2mm] 385mm, [30.9mm, 31.6mm] 400mm
[suspension] 40mm, [dropper] (27.2mm) 100mm, (30.9mm, 31.6mm) 120mm
Claimed Weight
[27.2 x 100mm] 596g, [30.9 x 120mm] 596g, [31.6 x 120mm] 610g
Manufacturer Warranty

Overall Rating

4.5 based on 3 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 1 reviews
5 Stars - 2 reviews

Fits True To Size

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Runs smallTrue to sizeRuns large

What do you think about this product?


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4 out of 5 stars

January 15, 2022

Well built but not for big guys

I've used it once or twice and have initial impressions
6' 5"

Well built but not for big guys. At max pressure It bobbed while i was pedaling, I am 6'5" 250lbs. So if your over that i do not recommend it. I gave it 4 stars because i am sure it would work well for lighter riders. Guessing 200 and under would work well but not sure above that.

Eric S
5 out of 5 stars

May 14, 2021

Upgrade that any hardtail needs

I've used it several times
Size Bought:
30.9 x 120mm
5' 8"

I was searching for a dropper post for a while and saw this with air suspension. I bought it and installed it with the PNW loam lever on my Giant Talon 2 and its been amazing so far. It is not meant to make it feel like a full suspension bike but its meant to smooth out the rough bumps and big rocks that you come across. I highly recommend this for anyone who's in need of a dropper post.

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Karlo R
5 out of 5 stars

April 21, 2020

100% diggin it

I've put it through the wringer

threw it on a SC Stigmata with 650 wheels and it's just an all around good time bike now. where i notice the suspension the most is on rough climbs. the gentle suppression allows for you to maintain the pedaling power versus being bounced around from big rock to big rock. also super pleasant on the pelotas when you find a random pothole.

Andrew C