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FOX Racing Shox Doss Dropper Seatpost with Remote Lever

$339.00

Item # FRS0138

5 5

Community Rating | 8 Reviews

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  • Select options
  • 5in Drop, 31.6mm ($339.00)
  • 5in Drop, 30.9mm ($339.00)
  • 4in Drop, 31.6mm ($339.00)
  • 4in Drop, 30.9mm ($339.00)
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Item # FRS0138

Description

Drop in.

Fox wasn't quick to jump into the mountain bike suspension market. But, because of its motor-sport suspension knowhow, when they did it made a huge impact to the market -- for the better. The same holds true for its introduction of the Doss Dropper Seatpost with Remote Lever.

One aspect that's detracted from the utility dropper posts is lateral and rotational slop. When riding aggressively, you need to know what the bike is doing, and one way the bike communicates to the ride is through the saddle. To ensure nothing's lost to poor tolerances, Fox uses a dual internal cam mechanism to solidly lock the post into position.

One cam controls the anti-rotation apparatus, and the other controls post height. One nice feature to this system is that it's self-adjusting. As you use any post, wear is inevitable -- and, tolerances will be compromised. The Doss, however, will remain as solid as it was the day you installed it.

The cams are actuated via a handlebar remote with three distinct settings, which coincide with Fox's new Climb, Trail, Descend (CTD) approach to suspension settings. The ergonomic, all alloy remote can be mounted left or right, and above or below the bar to suit compatibility with any cockpit setup. The lever's reach is also adjustable to fit different preferences and hand sizes.

Another unique, adjustable feature is tune-able speed return. By adjusting pressure in the Schrader valve located below the post, you can speed up or decrease the rate which the post returns to its full height. And, the system is failsafe -- the post will always operate if pressure is lost.

The post uses a traditional two-bolt clamp that's simple to dial in the correct saddle level and fore/aft position. The Fox Shox Doss Dropper Seatpost with Remote Lever has zero offset and comes in either 31.6 or 30.9mm diameters, and has a 4in or 5in drop option.

Tech Specs

Material:
aluminum
Diameter:
30.9 mm 31.6 mm
Offset:
0 mm
Recommended Use:
cycling
Actual Weight:
5in Drop, 31.6mm: 620g 5in Drop, 30.9mm: 620g 4in Drop, 31.6mm: 620g 4in Drop, 30.9mm: 620g

Reviews & Community

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FOX Racing Shox Doss Dropper Seatpost with Remote Lever

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Here's what others have to say...

How do you decide between the 4" & 5"? I'm 6'2", would be going on an Intense Tracer. Riding mostly All Mountain, 160mm travel bike if that helps? Thanks:-)

Best Answer Responded on

Konrad,

Typically the longer version is for taller riders. I'd go 5" unless you prefer one with a little less drop.

. If you have any questions feel free to reach out to me direct. My number here is 801-736-6396 x 5630 or email adewitt@competitivecyclist.com

3 5

Interesting...

  • Familiarity: I've put it through the wringer

Solid dropper post with some quirks:
1. The lever is massive, which makes it hard to position next to other business on your bars
2. Stiff lever action--it isn't long before you get a mondo thumb
3. Middle position isn't quite right
4. Slight play in *my* post after about two months of riding
5. Seat-level cable connection means that (like many posts) you're faced with cable drag and housing management issues that can become a PITA

Otherwise, I love this thing. Really, it does the trick. I'll keep it until I can find the pennies (or justification) to upgrade to a KS Lev.

5 5

Paired the DOSS with the Superlight 29

  • Gender: Male
  • Familiarity: I've used it several times

I agree wholeheartedly with the positive reviews here. I paired the 4" drop DOSS with a Santa Cruz Superlight XT 29'er and am very pleased. Some comments to offer here:
1. Excellent quality of materials and workmanship. Entire unit is solid and very precise feeling.
2. Fox falls short on the instructions for set up. They should have provided a guide for seat post psi versus rider weight to spare the new user having to experiment, and repeated mounting and unmounting the DOSS to access the relief valve. I weigh 160 pounds and finally dialed in the right pressure after a few tries to just under 5 psi. If your a heavier rider than 160 I'd say 10 psi would work for 185 lbs, and the max of 25 psi might only be practical only for someone weighing over 220.
3. The slight free play noted by others happens only for the moment the seat post is transitioning to a different height. Once you release the lever the locking mechanism clamps up the post very well.
4. There is no dampening mechanism for the return to Climb height from either Trail or Descent. So the seat comes up FAST. Even with 5 psi.
4. Raising the seat just takes a little common sense given the lack of return dampening. Depress the lever to release the seat lock as you lift your butt. DO NOT raise your butt before pressing the release lever or the seat will cover that gap in about a tenth of a second and slap your junk up into your skull and out you nostrils.

Anyway, an excellent product and added equipment feature that presents noticeable benefits to riding terrain variations.

Responded on

LOLOL @ "DO NOT raise your butt before pressing the release lever or the seat will cover that gap in about a tenth of a second and slap your junk up into your skull and out you nostrils"...Seems like Rockshox mite be the better bet since you can adjust the rate at which the height compresses and depresses...

5 5

Best I've used!

  • Familiarity: I've used it several times

Working like a champ. I've used several droppers and this one edges them all. The lever is kind of huge but I appreciate it now because I don't have to look down to find it and it's easy to push to engage. Dual button is not necessary for me but some may like the dual lever. The seat drops down into both heights real easy and pops up at the perfect rate with the recommended psi. I set the post at xc riding heights find the first drop height to be really good in mixed terrain and usually sufficient for everything but super steep or really gnarly terrain. I don't feel any play in the seat at all when riding.

5 5

great seatpost

i been used for 3 month and is amazing, i went to an enduro race, is so confortable, ligth, amazing.

4 5

Mostly Good

  • Familiarity: I've put it through the wringer

Nice mate to Fox fork and frame shocks. Small amount of up/down play (2-3mm) when all the way up. Cable guide will rotate around to back of post which helps when locking in a bike stand. Recoil/return is powerful with the advised 25 psi. - make sure you're in the right spot or it will spank your junk. Seems un effected by cold in contrast to what I've seen from friends with other models.
I put the 4" unit on a 5" travel bike.

is this the newest one that comes with 3...

is this the newest one that comes with 3 settings up down and lowered but not all the way down

Best Answer Responded on

Yep, 3 position like the Fox Shocks basically. CTD
1. Fully Extended - Climb
2. Mid Drop - Trail - Depress Both Levers Together
3. Full Drop - Descend - Big Lever Only
I posted feedback about a slight amount of play in the post but finding that common in almost all makes after talking with many riders in an Enduro Event. This is a good seat post. Hope that helps.
Cheers!

5 5

Solid and Reliable.

  • Familiarity: I've put it through the wringer

I bought one for my All Mountain bike and love that it has the 3 settings. An infinite post would be too hard to use for how I use the dropper. I set it in the middle position for all my "normal" riding which includes climbs up to 15% grade give or take, then I can extend it the extra 40mm for the Really steep stuff, 20% grade and up. Then I drop it all the way down for the descent. You always have it right where you need it in an instant without having to reset it somewhere in between. It just is a much simpler design, and there is a certain genius to that simplicity. I would imagine it would be a big plus for a racing application. I liked mine so much I bought a second one for my Downhill bike. now I can pedal the flat with a lot more ease and still drop it completely out of the way for the gnarly stuff. The two stage lever makes finding the position you are looking for so easy you can do it at full speed and concentrate on the trail instead of the lever/seat height adjustments.

5 5

Reliable Dropper Post

  • Familiarity: I've used it several times

Great dropper post. Install is very easy. This post operates in 3 positions only: Climb - full extension, Trail - 40mm drop, Descend - 100 or 125mm drop. It is not infinitely adjustable like a full hydraulic. The cable lever actuation is smooth and the post drops with minimal effort and has a adjustable pressure setting for the air chamber for return speed. You can mount the lever under or over the bar on either side. If you're running a single front ring the lever works nicely under the bar on the left. Stout two bolt saddle clamp is nice.

5 5

Buy it!!

  • Familiarity: I've put it through the wringer

This has totally changed the way that I ride. It allows for so much more control on the steep downhills. I would definitely recommend this product.