The Two-X Upgrade Kit is not a standalone product.  It's a battery replacement kit, made to install into the Onewheel or Onewheel+ boards from Future Motion, in place of the stock battery pack.
Installation requires
- SAE Allen wrenches: 3/32", 1/8", 1/4"
- #1 Philips and flathead screwdrivers
- Crescent wrench which opens to at least 1"
- A good needle-nose plier or leatherman
- Blue painter's tape
- A digital or phone camera
Installation does NOT require
- Any permanent modification of any functional parts of the original product.
- Any soldering, crimping, or other wiring which requires specific experience.  All required electrical connections are connectorized.
Who can install the Two-X Upgrade Kit
- The most important thing is to have the will, patience, and time to carefully follow the directions in the video.
- For best results, the installer should be a handy individual good with small tools.  Someone who can, for example, install a car stereo or replace a cracked phone screen, is ideal.
- If this is you, awesome!  And if not, you probably know someone who would be perfect to help you. Still awesome.
- If you're having doubts, you can always seek a willing technician at a local computer repair, car stereo, electric bicycle, or RC hobby shop (show them the install video).
- You will want to line up your plan for this before you order the kit.
Installation video
Join our facebook forum, where anyone may ask questions about their installation of other Two-X users. 


- Best to find a large, flat surface that's clean and well-lit.
- Run down the battery to 75% or so before starting.
- The Onewheel should be clean, so should tools and hands.
- An open-top bin or box makes a great Onewheel stand.
- Installer should be thorough and careful.
- Removed parts should be kept together, with small parts in a ziploc bag.
- Before and After pictures taken for each step are useful in case of problems or if the board is ever to be returned to stock.
- The leftover old battery pack and screws should be saved. Same reason.


It will help to familiarize yourself with the intended Two-X wire routing.  Here are some pictures of a well-done installation, with the wheel removed for a good view of all the wiring:


Be Careful

The Two-X Upgrade Kit integrates deeply with the inner workings of your Onewheel.  While its guts are opened up, care must be taken to avoid breaking stuff in there. Two-X is committed to support our customers with their installations, but we do not perform them, and can't be responsible for what customers might do.

Have Fun

Think of it like building a new Lego kit.  Except with a so-much-more-awesome result.  Be mentally interested in taking on a challenge before you start, and enjoy the process.  Once it's finished, and you go to step on it for the first time, pay attention to any differences in how it feels.  Any sense of accomplishment you feel at this moment is fairly deserved :) 

After Your Install

Directly after your install, you want to make sure the board is working as it should.  Test it out, make sure it rides OK.

Before charging, understand the following warning:

Never plug an XR charger into a Two-X!!  XR chargers have the same plug in a blue color.  The blue plug is like kryptonite to a V1 or Plus, with or without Two-X.

If your board behaves weird in any way, you are advised to open your battery box back up and disconnect everything from the BMS, until you have a chance to diagnose it and debug it.  Often this will mean the difference between a simple issue destroying the battery set or not.

If you want, you can do a deep rebalance. To do that, plug in the charger, and leave it plugged in (even though the light will turn green) for 24 to 48 hrs (the longer the better).  You can watch the slow boring balancing progress using pOnewheel android app if you want.

There. Now go nuts and have fun.

Notes on Weatherproofing

Here's where I use some scare tactics to help you ensure your board doesn't get ended by water leaks.  When you are in there installing Two-X is the perfect time to re-seal your battery box.  Regardless you will need to seal the passage through the gland where the Two-X wires pass through, but you should check all the stock seals as well because they tend to age and fail.
Here's what can happen when water gets in to the battery box.  Don't let this be your BMS:

Water Damaged BMS
Look how an innocent quick dip through a stream can violently demolish a onewheel in minutes.

It turns out that the provisions for the onewheel battery-box water seal are not commensurate to the consequences of its failure.

Water Damaged Battery Box Lid

(Yes, I am totally kidding about "Inspect lid before every ride".  As if ;)

I advise everyone, before you ride thru a single puddle, to pull out your battery box and overhaul its seals carefully, to your own standards of weatherproofing. Whatever those standards are, they'll be better than what you're rocking now.

You can use any kind of RTV or silicone caulk, depending if an auto store or a hardware store is closer to you.  Here is some different goop which is no joke:  3M 08008 ( ).

Here are some steps to seal the battery box:

  1. Ensure foam gasket on box top is squishy enough and seating correctly all the way around. Check its coloration for evidence of liquids or particulates.
  2. Keep Two-X wires from being stuck between lid & box sides, jamming seal.
  3. Check the sheet metal lid is flat, not bent too much between each screw and that the screws are tight, uniformly, to seal well.
  4. Add a bead of sealant around the LED window gasket
  5. Fill the gland passage with sealant to fill gaps between two-x wires.
  6. Check the gore-tex pressure vent is sealed all around and not tearing off.

As for water seals of the Two-X satellite packs ...

Although the satellite packs contain no active circuitry and no voltages higher than 13V, they are very hard to open, so if water gets in there it'll end up corroding stuff.  Unless they get damaged, water can only get into them through their tops or around the wire entry point.  Vibration can eventually cause the rubber sealant to fail after heavy use, so periodically you should check the seals and reseal them.  Here's how:

          First, identify suspect areas to add sealant:

  1. Unscrew the two housings from the board and flip em over in place. clean and inspect the top side.  Specifically, the crack around the edge where the lid seals to the box. Note any areas where there may be openings which could be a way for liquid to get in.  The perimeter of the top side could use goop.
  2. Same goes for the point where the wires enter the box.
  3. If your unit has tiny screws holding the lid on (they don't all), you may cover each of them with goop.
  4. If all of those places are sealed then the only remaining path for anything to get in is down the shrink tube where the wires are.  This has been purposely left unsealed to provide a channel for air to equalize pressure changes.
  5. Now seal em up! :  Squish the 3M sealant goop all down into any cracks with your fingertips. Eeeeew squishy!!

         Yer all done.

Questions on installation?  Email us: