Your cart is empty.
Your cart is empty.Product Description
The Jump Seat is the easiest to install and easiest to operate dropper post on the market — just attach your favorite saddle using the simple one-bolt clamp and go, with no cables to fuss with. Pull the lever under the saddle and use your body weight to drop the saddle, pull it again to return to full height, or anywhere in between.
Dirt jump and park riders can slam the seat for air time and raise it up to ride home without risking tangled cables or carrying tools. Commuters, cargo bike riders, and tandem stokers can use the Jump Seat for easy dismounts and to put their foot down flat at stops.
Jump Seat Features
No Cables
The Jump Seat is all-in-one, with easy installation and no cables to run.
100mm Travel
A full 100mm of dropper travel lets you get the seat low for descents and stop lights, full height for pedaling, or anywhere in between with infinite adjustment.
Sealed Cartridge
The sealed hydraulic dropper cartridge is designed for multiple seasons of riding with minimal maintenance. When maintenance is needed, a full teardown takes roughly 10 minutes.
27.2, 30.9mm or 31.6mm Diameter
Available in 27.2mm, 30.9mm or 31.6mm seat post diameters to fit most bikes.
Easy Installation and Operation
Easy installation with no cables.
Pull the lever and use your body weight to drop saddle.
Release the lever to leave saddle in dropped position. To return to full height pull lever again with no weight on the seat.
TranzX Jump Seat Measurement Chart
Ross
Reviewed in the United States on February 24, 2025
Does exactly what it's supposed to do! Love this for my touring bike in case I want to get gnarly. It's so easy to install and move around unlike conventional droppers. In the winter, I slap this on my fat bike, and it works no problem in the cold and snow.
Tommy V
Reviewed in the United States on September 1, 2024
I got this for my son’s mountain bike. He started racing mountain bikes and part of the league requirements was that the bike have a dropper post. He did not want another lever on his bars so we got this option. We both ride a LOT, sometimes through some really nasty trails. I was worried that this wouldn’t take the abuse but it totally does! This dropper is very smooth going down and on the return back up. It has worked perfectly every single time! My concern was that he would have to take a hand of the bars to use it but he has not had an issue. He says you gotta treat it similarly to shifting your gears. You should change your gears BEFORE climbing that steep hill, you should lower your dropper BEFORE going down that sketchy down hill section. Very very easy install as well! Great value for the money! You can set the height to different spots along the seat post tube of the bike. He is 5’3” on a size small and this is perfect. I am 5’10” on a size medium frame and I also use a 100mm dropper. If you’re over 6 feet you may want to consider a dropper with more travel.You can also set your seat height to normal riding position, then lower it to where you can comfortably move around, measure the distance between how much you moved the seat and decide what travel you need for your dropper. Great quality, easy installation
Jean Montague Customer
Reviewed in Canada on June 25, 2024
Love this product. Well-made, works great, makes for an easy ride getting on and off the bike. I'm 74 yrs. old, had a total hip replacement, have trouble swinging leg over the seat, this works just as I had hoped. Great job, guys. Jean Montague
A. Marks
Reviewed in the United States on May 13, 2024
The single-bolt-does it-all bracket was jammed when I got it. I had to disassemble it and get the inner piece near the holt head unstuck. Then, with a handful of loose parts, each wanting to go its separate way, it took a minute to get the seat rails in the bracket and the bolt tight enough to let me get the lubed dropper post in the seat tube. I adjusted the seat angle, and height, torqued everything, then squeezed the lever. The seat popped up 100mm, 100mm above my intended seat height. The seat angle was good, but I lowered the dropper post four cm. I straightened the seat, torqued the seat post clamp to 4 nm, and took it to the driveway to try it.It's much easier to get on/off with the seat dropped. It's less nerve wracking to make a 180 in the grass at the end of the drive. I was able to raise the seat while riding, just stood on the pedals a bit. The coolest part was positioning the seat between its two extremes: lots of seat height options.I think this is a good value. Decent cable actuated dropper seatposts start around $170 and go up quickly from there. Electric ones are more. I don't plan any hairy descents with this, I don't race either. I've found myself on narrow obstacle strewn trails with long, steep slopes 10" from my wheel and my seatpost sky high. This will cure that. I think descending rutted forest roads this summer will be easier with a lower seat too. This is much better than adjusting seat height with the seat post clamp. Stop, lower the seat some, and roll on, slow and safely..Don't let my kvetching in the 1st paragraph put you off this great product. I think it might have been an open box item, or someone somewhere with a drill driver and 5 mm tip was in a hurry tightening the one-bolt-that-does-it-all.
francois gagnon
Reviewed in Canada on April 28, 2024
i use it on my cargo bike and it weight in at 92lbs, this seat post is solid and function very well for the price , worth it , love it
dedjr
Reviewed in the United States on March 22, 2023
This dropper post works great.Installation is as easy as possible - ditching the usual multipiece rail mounts that require 3 hands to install a seat is a great feature and of course the post just drops in like a rigid post would.The caveat - I didn't anticipate how awkward it would be to reach all the way back to my crotch to actuate this post. Seems easy right? But on a gravel bike your upper body is reaching out front to the bars while you're reaching back the opposite direction while standing on your pedals. Not a great position to be in while descending on rough or loose terrain. The good thing is this thing works really fast - takes less than a second to actuate. (It's also extremely smooth.)I'll get used to it and will get better at it but for now I'm trying to remember to lower/raise the post earlier than I would on my mtn bikes with their remote actuation.
Richard T.
Reviewed in the United Kingdom on May 22, 2022
Really impressed with this dropper post. I’m sure there are better out there but the complicity of being able to install this in 5 minutes and no cable routing to have to mess around with is great. Reaching under the saddle to adjust the seat height is easy to get used to and I was surprised at how quickly I’ve come to the view that I won’t go back to a normal post
marcus4103
Reviewed in Canada on February 24, 2022
I bought it for stopping at red light to lower the seat so I am not tiptoeing and it works great
Random Citizen
Reviewed in Canada on October 18, 2022
I put this on my Session, which has a 6.25" insertion. With the shim, it works perfectly. Better than fooling with the quick-release clamp.Only downside is that the lever gets in the way of hooking the bike up by the seat for washing and such.
Mark L. Hyatt
Reviewed in the United States on October 18, 2021
If you are a young, hot rod mountain biker, down-hiller, competition rider of any sort...this is not the dropper post for you. Having a handlebar-mounted, cable-operated dropper is going to be what you want. But you guys and gals already know that. If you, like myself, are older and prefer a higher seat height for pedaling, but find that uncomfortable in tight or slow-moving situations where you can't easily put your foot down...this one works great. You have to reach under the horn of the seat to adjust it. This means in a panic situation, you are not going to want to take a hand off the handlebars to do so. Yet, when riding reasonable speeds and knowing where you are going, you can easily drop it down for situations where you may have to make a sudden stop, or in heavy walking traffic, or crossing a creek washout on a dirt road. There is a lot of that around here. I ride a rather heavy fat tire e-bike. It's a little tall for my 30" inseam, especially with a fixed seat height. This dropper post makes it easy to get on and off the bike. You do give up a little on the lowest it could go with a stock seat post. Guessing it raises it 1.5 inches. Have not measured that.The adjustability while riding for 20 miles or so, is wonderful on the legs. Too low of a seat height kills my thighs when pedaling...but it sure is nice getting on and off the bike, and at intersections, etc. BTW, for those that know nothing about how these work? It's just like an office chair. Pull the lever with your butt in the chair, and it drops. Pull the lever with no weight on the seat, it raises to the max.
Recommended Products