PNW Components Rainier dropper post review

Quality, reliability, and affordability in the dropper post category?

Shows the details of the robust head.

The head of the post is quite robust (click to enlarge).

Lowdown: PNW Components Rainier Dropper Post

Dropper posts have risen in popularity over the years as riders have discovered the benefits in almost all aspects of riding. But cost and reliability have remained an issue, as many cost $400 and up with reliability continuing to be an issue. As a result, some riders still hold out, or at least don’t install them on all their bikes due to cost and maintenance.

Weight of the 27.2 is 583 grams.

Weight is 583 grams for the 27.2 model(click to enlarge).

PNW Components is an upstart component maker from Seattle, which has a wealth of bike industry experience. They’ve taken their know-how and overseas manufacturing relationships to deliver a dropper post called the Rainier. The post is infinitely adjustable and has an externally routed cable. They have two posts, one in the hard to find 27.2mm diameter with 80mm travel for $275; the other a 30.9mm with 120mm travel for $270.

Stat Box
Diameter: 27.2 or 30.9 Travel: 80mm (27.2) / 120mm (30.9)
Total weight: 583g (27.2) / 753g (30.9) Post length: 330mm / 425mm
Price $270 / $275 Rating: 4.5 Flamin' Chili Peppers 4.0 out of 5 for the 27.2 model

  • Infinite adjustment
  • 80mm and 120mm travel a bit odd
  • Damped action
  • External routing only
  • Easy lever actuation
  • Rise speed/pressure not adjustable
  • Robust design
  • 30.9 difficult to push down for lighter riders
  • Minimal post wobble
  • 30.9’s long post may not fit all bikes
  • Can’t pull up post from down position
  • Good value

Review: PNW Components Rainier Dropper Post

Some believe that the dropper post is the greatest advancement in mountain biking. But the category is not perfect, as there are issues such as price, functionality, and reliability. Over the past 5 years, we’ve been plagued with $450 posts that frequently break down. And functionality has not been perfected, with posts that are only three position, are undamped, or exhibit a lot of play.

Post and lever are mounted on a Trek Fuel.

We mounted our test post on a Trek Fuel (click to enlarge).

The folks at PNW Components aimed to address these issues of price, reliability, and functionality with the Rainier post, which costs $270. Then they followed it up with an infinite position post that locks in place at any position. Light lever action controls the damped rise of the post.

But to offer a product at that price, PNW had to pick their battles. They’ve succeeded in bringing an affordable and functional post to market, but it does have its shortcomings, including the fact that it is external routing only. This can be a problem when the post is dropped and the cable gets in the rider’s way.

Continue to page 2 for more of our review of the PNW Components Rainer dropper post

About the author: Francis Cebedo

The founder of mtbr and roadbikereview, Francis Cebedo believes that every cyclist has a lot to teach and a lot to learn. "Our websites are communal hubs for sharing cycling experiences, trading adventure stories, and passing along product information and opinions." Francis' favorite bike is the last bike he rode, whether it's a dirt jumper, singlespeed, trail bike, lugged commuter or ultralight carbon road steed. Indeed, Francis loves cycling in all its forms and is happiest when infecting others with that same passion. Francis also believes that IPA will save America.

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  • Tony Lapinskas says:

    Maybe I’m extremely lucky, but I bought two KS E-tens 3 years ago for $135.00 each and to this day, knock on wood, they are working just fine. Now either KS lost their butt money wise on these posts or everyone else is just plain gouging the public. I also bout a $249.00 KS 27.2 Supernatural and although you need a Superman thumb to activate, it also works fine. A pipe, a spring, some cable and a lever, seems KS priced the E-Ten just right. All these Mfg’s are going to have to do better price and reliability wise or it’s adios. Listen up PNW.

  • Jeff Wagner says:

    I really like the idea of a spring operated 27.2 vs pneumatic. I have 2 KS LEVs and one is always in need of repair. What I was told is that there is just not enough chamber volume for an effective 27.2 dropper.

  • Lars Theman says:

    How does this stack up against the 27.2 Gravity Dropper?

  • Mike Wilander says:

    I bought the Rainier 27.2 and have been very happy. Very reliable, solid-feeling, and at a reasonable price. I actually made a review of the post that can be found here:

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