TransX EDP01 Wireless Dropper Post [Employee Review]

Words by: Trevor Mejia

Is there finally competition against the RockShox AXS Reverb? 

TransX is a big player in the dropper post world, many of the posts on the market today are made by Trans X, but until now the posts under their own brand were good but similar to everything else. The Trans X EDP01 wireless dropper post changes that notion and the brand now has a very competitive wireless dropper offered in a longer length than the RockShox Reverb AXS. Wireless components have become commonplace on higher end bikes. We are now even seeing groupsets like SRAMs newest T-Type Drivetrain being a wireless only option, as well as some frame manufactures creating bikes without the option for cable routing. This can be a polarizing topic for some, but it is here to stay, the future is now. A wireless dropper post can solve many headaches in one package as there is no cable to route or cut to length, and the ease of swapping seatposts between bikes in a matter of minutes is valuable to many. Wireless dropper posts also give the ability to retrofit a dropper post to an older style bike that did not have internal routing for a dropper in mind!  

Rockshox's AXS Reverb post has been one of the only options for a wireless dropper post since its introduction to market in 2019, and has been one of the most reliable and convenient options for a dropper post to this day. There are still a few things that have yet to be addressed by the industry giant however. The Reverb AXS tops out at 170mm of travel, falling behind industry standards, and its price point at over $850! 

What’s New:

TransX seeks to fix these problems by introducing the EDP01 wireless dropper post. This post tops out at a more usable 200mm of travel, along with 170mm and 150mm if need be in 30.6 or 31.8 diameters. It comes with its own proprietary seatpost battery, charger, a remote lever that is matchmaker compatible and a CR2032 battery for the shifter. TransX claims that they have some of the shortest dropper posts in terms of overall length, with the 200mm travel post measuring out to 545mm and the 170mmm travel post at 485mm for the overall length (bottom of actuator to top of rails). Frames are getting better about having continuous, longer seat tubes for this reason, but it is still important to get the shortest overall dropper post with the largest amount of travel. 

Install/Setup:

When I built up my custom Yeti SB140, I chose a full SRAM build, including the newest XX T-Type Drivetrain, and AXS Reverb post. After building it there was one problem. I have very long legs and the 170mm maximum travel that is offered by the AXS post was simply not enough. I had literally a few inches of seatpost sticking out of the frame to reach my desired saddle height. I was very happy to test out this TransX post because a 200mm travel post is really what is required for myself. I was able to mount up the remote shifter with ease to the existing matchmaker setup, although there is only one mounting hole in the remote shifter, so I had to get a right hand matchmaker for the left side to get the remote in the right spot for my thumb. It also comes with a standalone clamp if you are not running a matchmaker system. The saddle rail clamp is very similar to the design of the Reverb AXS with a clever tilt screw and makes installing a saddle much easier than a conventional setup.  It is important to torque these bolts to specifications or there is a good chance of the seat slipping while riding. Pairing is also straightforward following the instructions in the manual. 

Ride Impressions:

While riding and using the seatpost, it does not come up as swift or instantaneously as the Reverb AXS but still faster than any analog post and you are still just pressing a button instead of actuating a whole lever. It works as intended and its speed has not been an issue. I have found this to be more important as you get more tired on the bike,the little things add up overtime to a better experience. The post has infinite adjustability, in that where you chose to have the seatpost it will stay in that position, and it is smooth in its actuation and feel when moving up and down the stanchion. 

After riding this post for a few months, I had only a few issues. The post started to make some noise when riding in its lowest position, the internal cartridge was coming loose but that was a quick fix to tighten up the nut on the bottom of the post. Also, TransX claims the post can be actuated 6,000 times in 1 charge for their battery and I had the post die on me much sooner than that, luckily at the end of the ride. I can attribute this to keeping my bike on a rack and commuting often in my truck. The vibrations wake up the system and drains the battery slightly while it is moving. This is something inherent with wireless systems and happens across the board. It is important to be diligent with charging these systems as it is still very possible to run out of juice when you need it the most. It is always a good idea to carry a spare battery while riding to help eliminate that possibility. There has been no leakage from the seals nor has the post slowed down or failed to reach topout during my time testing. 

Pros/Cons:

Pros: 

• Cheaper than it’s competition 
• Wireless and easy to setup / swap between bikes 
• 200mm travel 

Cons: 

• Not as refined as Reverb AXS 
• Still a heavy seatpost 
• Seatpost remote is a bit bulky 
• Not compatible with SRAM AXS batteries 

Final Thoughts

I’ve been comparing the TransX seatpost a lot to the AXS Reverb and for good reason. They are very similar posts and achieve what a lot of people are after, getting rid of cables on their bikes for varying reasons. The TransX EDP01 gets you that much sought after 200mm of travel for a fraction of the price at $500 MSRP. For those not willing to dish out the extra cash to get the AXS Reverb but are still looking for that wireless dropper seatpost, TransX is a welcome addition to the market. Still a relatively expensive upgrade for your mountain bike, but covers all the necessities for a wireless dropper seatpost at a better price point.  I am looking forward to continuing to run this post in the future as it accommodates my needs for a longer travel post better than its competitors.