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Fox Doss 5" Dropper Seatpost

Item #: SE247G00
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Fox Doss 5" Dropper Seatpost

Fox’s new D.O.S.S. dropper seatpost brings some unique features to the dropper seatpost game. The remote lever for the D.O.S.S. dropper seatpost features two levers in silver and black. The two levers help in dialing in just the right amount of drop on the post and not have to hunt blindly. Push the smaller black lever and drop the post 40mm to the trail setting. Hitting the black lever again raises the saddle back up to the full height (climb). The silver lever allows the dropper post to move throughout the whole range of travel, including stopping at the 40mm Trail position. The three positions correspond to the Climb/Trail/Descend positions used in the new 2013 Fox suspension lineup. When in the middle of tackling the toughest trail, the perfect seat height is just a flip of the lever away. The lever can be positioned above or below the bar and on either the left or right side.

A low amount of air pressure of between 10-25 PSI is required to smoothly and quickly return the Fox D.O.S.S. dropper seatpost to the full length climb setting. The cable moving from the remote to the post can also be attached to either the right or left side of the saddle to keep the cable routing on different frames clean.

Travel Positions
Climb (Fully extended)
Trail (Middle position-40mm below Climb)
Descend (Lowest position)

  • 5” / 120mm Travel Dropper Post
  • 1.37 lbs / 620 g (post, remote lever, hardware, cable and housing)
  • 2 Bolt Micro-Adjusting Saddle Clamp
  • 31.6mm or 30.9mm Post Diameter
4.9 / 5.0
17 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Works great
Before I got this seatpost, I had a few nasty falls because my seat got in the way going off some drops. This is the perfect solution. Surprisingly, I was most impressed by how much extra power you can get on climbs by raising the seat up just a small amount. The three stop positions work really well.

PROS: Easy To Install, Durable
December 12, 2012
Madison, WI
Awesome Dropper Seatpost
I ordered the 5 inch dropper post even though it was not in stock. I was pleasantly surprised when it arrived early before the in-stock date!

PROS: Durable, Easy To Install, Cable Actuated, Attractive Design, External Frame Routing, 3 Set Positions

CONS: It Adds Weight

BEST USES: Mountain Biking, Uphill, Downhill, Technical Trails
April 22, 2015
Ogden, Utah
Great seatpost , fast rebound
Expensive but well worth it .

PROS: Great Rebound

CONS: Remote Big On Handlebar
January 23, 2013
Yorba Linda ca
I have this on a Yeti SB-66 with a float and talas CTD. It's awesome having CTD on all three components. This is my first dropper post so I have no benchmark. I primarily ride technical all-mountain trails but don't like to shuttle or do the lift-service thing too often.

This thing is built burly. The lever is intuitive to use; it only takes a minute to figure it out and get used to. Having a middle position (trail-riding) is fantastic; I use it the most. I thought about going with the Rock Shox Reverb but having an infinite amount of seat heights sounded exhausting. The 1" drop from climb to trail mode makes a big difference.

My only problem with this seatpost is apparently a common occurrence with other brands as well (according to my mechanic): seat has a little bit of lateral play, no matter how tight you fasten it to the seat's rails. This doesn't affect the ride quality but I have to remind myself every time I ride.

PROS: Ease of installation, Design, Build Quality

CONS: Seat Play

BEST USES: Enduro, all mountain
September 9, 2012
Salt Lake City
Solid Performer
I got this seatpost after having a number of problems with my Rockshox dropper post. I am much happier with the Foxx dropper post. While everyone may not like the three set levels for the post, I think it works brilliantly for the type of riding that I do which has a mix of up and downhill riding. I have not seen any problems develop like I did with the Rockshox dropper post.

PROS: Well Engineered, Durable, Easy To Install

BEST USES: Any Ride W Updown Hills, Racing, Mountain Biking
August 22, 2013
Atlanta, GA
Nice piece of kit
Easy to install and get set up compared to other dropper designs that require bleeding. Of you can run a gear shift cable then that's all you need to know. The best is the quick return. Its fast but not forceful.

PROS: Durable, Attractive Design, Easy To Install

BEST USES: Racing, Upgrade, Mountain Biking
August 11, 2015
Asheville nc
Fox dropper
Exactly what I want it

PROS: Attractive Design, Durable, Easy To Install
November 9, 2015
Puerto Rico
Awesome, love it
I looked at all the dropper posts and did a lot of comparing. I ended up ordering the Fox DOSS and I don't regret it one bit. When I pulled it out of the box it looked very nice and quality built. The remote lever looked a little bulky but very solid and I don't think it will ever break. The remote lever was a bit of concern for me as I heard a lot of people complain about it. Well I found the perfect spot for it and worked out waaay better than I had thought it would.

Yes the remote has two levers (black and silver), this is a concern for some people as it being "too much". I discovered that having this design is the perfect set up. I see why Fox made it this way, its awesome! The 3 positions are just right and I have no complaints.

After using this post I don't see a need for having a post that you can adjust anywhere in the stroke. When you're hauling the mail down a trail you don't have to worry about getting the "right" height. Just use the levers and bam your in the right position every time without thinking about where to stop the post.

It's very smooth operating and the cable routing is on the side instead of being in the rear. This is just a great design as the cable will never get in the way of the rear tire and actually made cable routing a little better on the frame.

I have used this post a lot since my purchase as I ride quite a bit through out the week. I can tell its going to bring me years of trouble free use and enjoyment.

If your looking for a quality dropper post that's easy to operate. This Fox DOSS is well worth the money!

PROS: Easy To Install, Durable, Attractive Design
April 13, 2015
San Diego, CA
vvery reliable and easy to use post
Very simple to install, no mess bleeding things, strong and almost no play.

After my very bad experience with the Reverb, I decided to give DOSS a chance. I am glad I did! It is very very reliable and smooth to operate. Excellent lever as well. It is ergonomic and simple to operate. So far there is no better post out there.

PROS: Very reliable

CONS: Cost
October 4, 2012
Vancouver, BC
Amazingly Functional
I use the D.O.S.S. countless times every ride. I love downhill and a dropper post adds the fun and ease of continual descents without stopping and dropping. I bought this as the first generation Fox made and waited months after all my friends had a dropper post. It was going to be Fox or Thomson. I hate things that do not function properly and I always go to one of a handful of companies that, although not inexpensive, deliver on function and durability. Years later I still have mine. I just hope it fits a new Yeti SB5 someday. 30.9mm

PROS: Durable, Attractive Design, Easy To Install, Fox Functionality

CONS: Additonal Weight
May 27, 2015
Mill Valley, CA

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