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PNW Components Rainier Dropper Seatpost - Internal Routing

PNW Components Rainier Dropper Seatpost - Internal Routing

Item # PNW0007

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  • Black, 31.6x410mm/125mm Travel ($259.99)
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Item # PNW0007


Less finicky than the competition.

PNW Components developed the Rainier Dropper Seatpost with Internal Routing for greater levels of reliability, smooth operation, and easy servicing in mind, so you can spend more time riding your favorite trails and less time messing with a finicky dropper post. It's available in a wide range of dropper lengths, from the shorter 80-millimeter options for endurance and XC riders, all the way up to 125-millimeter versions for dedicated trail enthusiasts seeking a greater drop across technical terrain.

The Rainier Dropper lacks an adjustable air preload, which means its return speed isn't adjustable and it's a bit heavier than others on the market. However, before you run off to look at the competition, PNW Components actually scraped this design feature due to its increase in manufacturing costs, as well as its tendency to become sticky, due to the tiny tolerances needed to make adjustable air preload work. Instead, PNW Components uses a spring for the preload, which keeps its overall cost very affordable and reduces overall maintenance for less hassle on the trail.

Its sealed damping cartridge consists of a two-stage damping unit that uses both air and hydraulic fluid, resulting in a nice, smooth rate of return—without having to constantly check on air pressure while riding. Not only is it very reliable, but it's also incredibly fast and easy to service, as the whole damping unit pulls out without much hassle. This is great, as there's no open bath of fluid and no replacement seals for easier servicing at the shop or home.

One of the last impressive features with this dropper lies in its ability to virtually eliminate play in the seat, which has incessantly plagued droppers since inception. PNW Components eliminates side-to-side play with their "Spin-Stop" technology. This innovative feature employs a keyed slider, with an inner portion with machined slots locking into the stanchion's brass keys, thereby eliminating the side-to-side motion experienced with other droppers over time. It's freely able to move vertically, but will never experience the dreaded play that's annoying at best.

  • Reliable dropper post is cheaper and less finicky
  • Large range of dropper lengths: 80mm, 100mm, 125mm
  • Trigger works on either side of handlebars
  • Internal routing for a cleaner aesthetic
  • Spin-Stop technology eliminates side-to-side play
  • Sealed damping cartridge for smooth, reliable return
  • Damping unit easily pulls out for servicing at home

Tech Specs

6061 heat-treated alloy
30.9mm, 31.6mm
[125mm, min insertion point to saddle rail] 335mm
80mm, 100mm, 125mm
sealed damping cartridge
Recommended Use:
mountain bike
Manufacturer Warranty:
2 years

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Smooth operation, bomber durability.

  • Familiarity: I've put it through the wringer

This is one of the best droppers on the market if you're seeking a smooth, simple option that's free of the gimmicky BS and reliable as hell. Installed this past June and haven't had a single problem after 40 rides or so. The lever is simple to actuate, resulting in smooth drops and quick returns back to its upright saddle position. I'm running it with an archaic 2x drivetrain (still like my granny gear!), and the lever doesn't crowd the bars too badly.

You can't adjust its return speed, but it's a perfect return that's neither too fast, nor overly slow and sluggish. I find it doesn't punch my undercarriage like some others with faster returns (cough, cough Reverb). Also, I haven't experienced any side-to-side play, which is a nice departure from some of the other big names in the field.