NuVinci Cycling bulks up for aggressive riding and e-bikes with new N380x CVP hub

We’ve seen it everywhere with bicycle component design recently – parts have to be made stronger to cope with the higher strain of e-bike motors. But in this case, it’s not only e-bikes that will benefit from the new N380x hub from NuVinci. Citing a growing need to outfit ‘Sportive’ bicycles, or what we would probably call a dual sport or hybrid, NuVinci wanted to make their stepless continuously variable planetary transmission a bit more robust. And that’s exactly what the N380x delivers…

NuVinci Cycling bulks up for aggressive riding and e-bikes with new N380x CVP hub
Photos c. NuVinci Cycling

The benefit of the NuVinci hub system has always been the stepless gear range which allows you to shift through a range of gearing without any steps or physical ‘shifts’. Add in their Harmony automatic shifting system which keeps the bike in a certain gear range based on preferred cadence, and you may finally have the automatic drivetrain inventors and tinkerers have tried to perfect for years.

In this case though, that same drivetrain is strengthened to be able to handle input torques up to 100Nm while still maintaining a 380% gear range. To put that in perspective, the hub is said to have no problem shifting under full load from a speed pedelec e-bicycle. The same durability makes it a better choice for dual sport bikes that will actually find themselves off road – or for cargo bikes for that matter.

In order to accommodate this new crop of bikes, the hub is compatible with 135 x 10mm, 142 x 12mm, and 148 x 12mm dropouts to allow for use in frames with mountain plus size tires. NuVinci says that the first OEM to use the new N380x will be Scott Bikes on their new E-Silence Evo which will be launched at Eurobike.


  1. Maybe I am missing something, but what is it about riding “off road” that requires a stronger rear hub?
    I don’t think I’ve ever seen a MTB hub that was built stronger on the drive pawl mechanism. Perhaps finer engagement, but not stronger.

    • Typically internal transmission hubs will slip on offroad terrain. This usually happens at a low gear, low speed situations where the rider can output maximum torque. Like getting up a steep slope, popping over a log, etc. Like you know how if you put a steel cassette on an aluminum carrier on a MTB you will tear it up so much faster than on a road bike.

      So don’t think about a normal hub, think about the transmission part of it.

      • Got it, I can see that with regards to slip torque ratings. I’d think any hub would be rated for the maximum torque a human can reasonably output + safety factor. Since its slip, its not really a safety issue and kind of self saving…thanks!

      • But, Nuvinci is not convetional planetary IG gearing. Its hydraulic. So out the window with your explaination. Do some research.

        • I think Jeff P was highlighting the slip characteristic of hydraulic transmission when he said “typical internal transmission hubs”. Granted there are planetary geared internal hubs, but given the context, his intent seemed clear.

          My original question was based on the fact that slip is due to excessive torque. I would not think a human was capable of putting down more peak torque off-road than on; however, the lower gear ratios used off road can result in higher input torque values on off-road hubs. I kind of disregarded the gearing difference between on and off road applications in my original comment (based more on the design use of the hub…i.e. not technical off road)

          • You should also keep in mind road use see quite continual torque while offroad will inevitably results in spike. So overbuilding make sense even for the same nominal input.

    • It’s marketing. But it is built for those E-Motobikes… apparently the amount of torque those little motors put out was causing some slippage…. maybe crap engineering or really not meant to coexist on trails. It’s you’re call

      • …you are obviously very ignorant on technical matters of IG hubs in general, and dont understand e-bikes yet. Then you attempt to politicize, weakly as well. You need to stop posting.

  2. “Photos c. NuVinci Cycling”

    reeboks and kickstands. thats a pretty lame photo TBH. is pay 4 play really more important than resonating with your readerbase? :/

  3. The Nuvinci 360 was good for commuting, not even that bad for a bit of off road. The 12 lb rear wheel on the other hand made it a little unwieldy. Guess these things can only be made so light.

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