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PNW Components
Rainier IR V3 Dropper Seatpost

4.4 out of 5 stars
5 Reviews

Style & Size:


Rainier IR V3 Dropper Seatpost

The Rainer dropper post has earned a solid reputation for consistent, reliable performance, so rather than changing the formula entirely PNW opts for some minor refinements that make this third-generation the best one yet. Travel is increased, and the travel is now adjustable in 5mm increments so you can fine-tune the fit if your ideal travel is somewhere between 170 and 200mm. At the same time, the post's total length is shortened, which is always a good thing—especially for bikes with interrupted or shortened seat tubes.


  • Reliable, affordable dropper with a wide range of travel options
  • Tool-less travel adjust for dialing in the perfect fit
  • Shortened total length fits a wider range of bikes
  • Sealed air cartridge offers smooth actuation
  • Constructed from lightweight but tough 7075 aluminum
  • Backed by a 3-year warranty for good measure
  • Remote sold separately
  • Item #PNW0016
7075 aluminum alloy
30.9, 31.6mm
[125mm travel] 393mm, [150mm travel] 443mm, [170mm travel] 483mm, [200mm travel] 543mm
125, 150, 170, 200mm
Claimed Weight
[125mm travel] 1lb 1.2oz (545g), [150mm travel] 1lb 4.3oz (575g), [170mm] 1lb 5.3oz (605g), [200mm travel] 1lb 6.6oz (640g)
1 cable stop, 1 sticker
Manufacturer Warranty

Overall Rating

4.5 based on 5 ratings

Review Summary

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

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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3 out of 5 stars

August 21, 2022

Not impressed. It shifts left to right.

I've used it several times

So I have a LUNA X2 Ludicrous EMTB, & I installed to replace the KS 100mm Remote dropper post but even though the KS is cheaper. It was way better when it came to not moving at all left or right. I have a PNW COAST on my Hardtail, & I assumed the movement right & left was due to the integrated 30mm travel suspension. But now I bought this Rainier 3 170mmTraval. Set to 0 & it does the EXACT same thing. I don't know how detrimental this is, or if it will cause issues or failures in the future. But the Cheap 89-dollar KS was solid as a rock. Tbh in 200 dollar range I'd consider higher end KS models. I contacted PNW will update if I learn anthing new.

Christopher E

Originally reviewed on Backcountry.com

4 out of 5 stars

May 6, 2022

Good dropper post

I've put it through the wringer

Functions exactly how it needs to consistently. In use for 2 years, only one minor tuning required. Does get a bit of play in it, but nothing that you'll notice while riding.

Brittan W
5 out of 5 stars

April 8, 2022

great product

I've put it through the wringer

I have been using this dropper for the last 18 months. works great. Need to do service soon though

Nir F
5 out of 5 stars

October 5, 2020


I've used it several times

This is a solid , smooth seatpost. Very little movement.

Clark B

Originally reviewed on Backcountry.com

5 out of 5 stars

August 16, 2020

Gen 3 is a Win

I've used it several times

I purchased the Gen 3 200mm dropper and love it. Have been using it almost daily for one month. Love the 5mm increment easy adjustability. That alone is reason to purchase. Should be an industry standard.

Nick F

Originally reviewed on Backcountry.com