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  1. #1
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    NuVinci n360 conversion

    Looking for conversion info. I called my local LBS (they are authorized dealer) to get quote on price and parts. They didnt call back so I sent an e-mail to the manufacturer...they didnt respond either. so here i am asking the community.

    I have a surly pugsley i would like to put this on. what im curious about is, what all needs to be changed/modified? I have almost decided to pull the trigger but i want to make sure im not going to be running into unforeseen costs.

    another question is, can you use a surly MWOD crank with this hub?

  2. #2
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    Just did mine

    Easy conversion. I decided to lace it to a Rolling Darryl. I removed the small and large chain rings. Of course, I removed the front and rear derailers.

    Do you have any specific questions?
    Attached Thumbnails Attached Thumbnails NuVinci n360 conversion-beals-point-1-29-2012.jpg  

    NuVinci n360 conversion-nuvinci-pugs.jpg  

    NuVinci n360 conversion-nuvinci-pugs-hub.jpg  


  3. #3
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    does the nuvinci come with everything you need to install it? like the chain and rear sprocket? and will this work with a MWOD or is that not advised/necessary?

  4. #4
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    The NuVinci comes with a 18 tooth cog. You will have to decide if it is the correct size for your riding and front chain ring. Surly cogs fit the NuVinci. You will need to shorten your chain. It should work with the MWOD.

  5. #5
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    I got mine from bikewagon.com (did an ebay make offer of $300) and it came with rear sprocket, all hardware, cables but no cable houses

  6. #6
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    I am not familiar with the quirks of the Pugsley, although I would like to be at some point, but here are my observations about fitting a Nuvinci to my Long Haul Trucker:

    Chainline: Nuvinci has a fairly wide chain line. I had to keep that in mind when ordering my bottom bracket.

    Grip shifter compatibility: Some handlebars won't work, but I think most mountain bike bars would be compatible.

    Gearing: Nuvinci has a lowest allowable ratio of the rear cog to the front chainring. 1:1.8, I believe. If my math is right, that makes a front ring of 33 with an 18 tooth cog.

    My original plan with my Trucker was to start with traditional gearing and eventually convert it, but when I realized that I'd also be replacing my bottom bracket, and maybe my chain rings, and possibly my handlebars, it suddenly looked more cost efficient to just buy all of those parts with the Nuvinci in mind. It's entirely possible that you could just add the Nuvinci and be ready to roll, but you might want to look at the various components and make sure it will all work properly. Fortunately it sounds like there are some Pugsley/Nuvinci owners who will know what pitfalls, if any, there are.

  7. #7
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    Quote Originally Posted by Rob_E View Post
    ... Gearing: Nuvinci has a lowest allowable ratio of the rear cog to the front chainring. 1:1.8, I believe. If my math is right, that makes a front ring of 33 with an 18 tooth cog...
    Some numbers...
    Attached Thumbnails Attached Thumbnails NuVinci n360 conversion-nuvinci-n360-input-gearing-gear-inches-mod-gain.jpg  

    Last edited by Canoe; 03-23-2012 at 08:12 AM.

  8. #8
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    I dont really understand gear inches and ratios. I am having an n360 w/18 tooth cog built for the rear on a 26x2.25 wheel/tire. I presently have a schlumpf hsd with a 28 tooth chainring. Am i ok as far as the nuvinci warranty? And can you tell me what the the lowest ratio would be in terms of rear cog teeth.

    Thanks

  9. #9
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    Quote Originally Posted by sbloom View Post
    ... n360 w/18 tooth cog built for the rear on a 26x2.25 wheel/tire. I presently have a schlumpf hsd with a 28 tooth chainring...
    Quote Originally Posted by Rob_E View Post
    ...Gearing: Nuvinci has a lowest allowable ratio of the rear cog to the front chainring. 1:1.8, I believe. If my math is right, that makes a front ring of 33 with an 18 tooth cog...
    For 18t on the 360 and your 26" wheel, this puts you on line three of green on the upper section of the chart I posted. Starts with 33 18 1.83.

    Your 28 to 18 is a ratio of 1.56, below the 1.8 recommended, and not warrantied.
    That said, it's been done.
    From my notes I collected reports from others:
    28 to 18 for 1.56
    32 to 18 for 1.78
    Quote Originally Posted by aTomOfAllTrades View Post
    ...I've run mine at 32/18 quite a bit on singletrack and noticed the drag while grinding up long hills. This past weekend I rode 30 miles on it at 28/18 and it was even more noticeable. If you're not doing heavy climbing and looking at more of an explorer bike that you don't ever want to have maintenance issues, it is the ultimate in reliable gearing (seriously, you will never break anything on this hub, only need to adjust the shifter cable tension once in a blue moon)......however, if you're wanting a super-low gear for loaded climbing, you will be working hard in that low gear...

    To reach the minimum drive ratio with 18t on the 360, you have to up the chainring to 33t or more.
    Keeping the 28t front:
    16t on the 360 gives a ratio of 1.75
    15t on the 360 gives a ratio of 1.87 (if there's a 15t that will fit - NuVinci says 16t to 22t)

  10. #10
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    thanks for the great response time and answer. I understand that other companies cogs fit the 360. so maybe i can a fifteen and not have to change out the Schlumpf chain wheel.

    Does anybody know the brand cog that fits the Nuvinci?

  11. #11
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    I don't know a specific brand. I would ask on the Fallsbrook forums. There's two factors you want to consider: Which cogs will fit. Which cogs will come off. Maybe the N360 is different, but with mine I had no issue finding a 3rd party cog that fit on, but it lacked the slots that would have made it work with the freewheel removal tool. Result was that I was never able to remove it. Although I've heard people mention other ways of removing cogs.

  12. #12
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    Quote Originally Posted by sbloom View Post
    ... maybe i can a fifteen and not have to change out the Schlumpf chain wheel...Does anybody know the brand cog that fits the Nuvinci?
    Search mtbr for who has what cog on the n360.
    But.
    I'd suggest you look for people reporting what combinations result in the character of pedaling for the types of ground you'll be on. As in, single track, city trails, touring, with a load, etc..
    Assuming you're not just trying to make it run for the lowest cost, then change things out to meet your specific needs later as you determine them.
    Last edited by Canoe; 06-20-2012 at 12:35 PM.

  13. #13
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  14. #14
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    Why is there a minimum drive ratio? Is it to prevent the rider from applying too much torque to the hub? If so, it seems odd that they recommend the hub for use with electric assist.

    I'd like to know how small of a cog can fit because i'm interested in running a nuvinci in a 20" wheel so i'll want a small cog even with a big ring up front.
    Bend, OR

  15. #15
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    Quote Originally Posted by Canoe View Post
    NuVinci says 16t to 22t
    As to the minimum drive ratio, I've been told there are too reasons.

    One: given that the previous design was way way overbuilt, resulting in an unnecessary weight penalty, the reduced weight N360 is not as strong as the overbuilt predecessor, with some assuming this means it is not strong enough.

    Two: apparently the real reason, and the reason the reduced weight/strength doesn't matter, is that under the minimum drive ratio you can get increasing resistance. Something to do with the internal fluid & surfaces, both wearing out the drive (hence the warranty restriction) and, as reported by many users who tried anyway, making for a lot of pedaling resistance when you put it under higher loads.

    Rather than think you'll want a small cog, have you calculated the gear inches you want and what sizes are required to get it? Save yourself time & money knowing what you want from the start.

  16. #16
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    Interesting, good to know about the potential downfalls of a lot of torque on the hub.

    Yeah, according to my calculations a 16 cog, 46 ring will get me about 29 gear inches on the easy end, and 103 on the fast end. That should be fine but i'm right at the 16t limit so i'm curious if i can go smaller. It can be tricky to go bigger on the front ring with the setup i'm considering.

    The 20" wheels would really help the hub to cope with the extra torque of the electric assist, so that's good. The drive ratio would be 2.88. That being nearly double the recommended means i should be able to put double the normal torque at the crank without the problems you mentioned.
    Bend, OR

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