Results 1 to 7 of 7
  1. #1
    mtbr member
    Reputation: Johnny Chicken Bones's Avatar
    Join Date
    Jul 2005
    Posts
    1,233

    Dyno power ground?

    I'm on the verge of a new build, will be using a dyno hub w/ a Supernova.

    Even on the Gucci NHBS builds it seems like there aren't super clean ways to route the power cord from the hub.
    Sure you can tuck it in tight and minimize it all but it's usually still a bit unsightly.

    Any of you electrical type folks see any problem w/ routing one wire straight to the frame as a ground?
    Then I'd have only one thinner wire to manage to feed thru the fork leg?

    I could then add a wire from the F rack to the light.
    One wire going from hub to the light.
    One wire going straight to the frame, then a second pulling from the rack (or any other conductive part) to the light.

    Anyone?
    No way i'm the first to think of this so perhaps there's a reason AC isn't grounded in this manner.

    -JCBs
    --------- __o
    ------- _`\<,_
    ------ (*)/ (*)
    ******************
    Running is for prey.

  2. #2
    mtbr member
    Reputation: znomit's Avatar
    Join Date
    Dec 2007
    Posts
    1,877
    The shimano hubs are designed for this. One connector shorts to the frame.

  3. #3
    mtbr member
    Reputation: Johnny Chicken Bones's Avatar
    Join Date
    Jul 2005
    Posts
    1,233
    I was getting ready to say "yea yea... I have that part on several bikes blah blah blah" and then I saw that little symbol on it. Which I've never seen.

    So what you're saying is, that means ground?
    You're brilliant and thank you for the help.

    -JCBs
    --------- __o
    ------- _`\<,_
    ------ (*)/ (*)
    ******************
    Running is for prey.

  4. #4
    Randomhead
    Reputation:
    Join Date
    Sep 2008
    Posts
    1,178
    yeah, check to see if your hub grounds to the frame. I think all of mine do. Haven't checked the fatbike schimidt yet. I use gorilla clear repair tape to tape down the wire. It does make a pretty clean setup. Use latex gloves to keep the fingerprints down.

  5. #5
    mtbr member
    Reputation: Johnny Chicken Bones's Avatar
    Join Date
    Jul 2005
    Posts
    1,233
    Unter-
    This is interesting, the idea that the hub is already grouded is clever.
    Do you know if a Shimano Alfine is grounded? I'm guessing not.
    --------- __o
    ------- _`\<,_
    ------ (*)/ (*)
    ******************
    Running is for prey.

  6. #6
    Randomhead
    Reputation:
    Join Date
    Sep 2008
    Posts
    1,178
    I think the Shimanos are all grounded. Old dyno systems always had the frame as ground, and I am pretty sure Shimano stuck to that with their dynohubs. I don't have an Alfine, but all three of my shimano hubs ground to the frame. If the wheel isn't on the bike, you can actually see the sheet metal connection between the ground terminal and the axle.

  7. #7
    mtbr member
    Reputation: Johnny Chicken Bones's Avatar
    Join Date
    Jul 2005
    Posts
    1,233
    I'll put the voltmeter on the hub tonight.
    This idea of a grounded hub is brilliant.
    (Yea- that's a pun)

    Thanks
    JCB
    --------- __o
    ------- _`\<,_
    ------ (*)/ (*)
    ******************
    Running is for prey.

Similar Threads

  1. SP dyno hubs?
    By lighty in forum Bikepacking and Bike Expedition
    Replies: 8
    Last Post: 05-09-2016, 07:30 PM
  2. Replies: 2
    Last Post: 11-19-2015, 08:18 PM
  3. Schmidt SON dyno-hubs available in 135
    By sparrow in forum Fat bikes
    Replies: 2
    Last Post: 09-30-2013, 05:40 PM
  4. Shifting ON power/climb vs. OFF power/road (29er)
    By brmena101 in forum 29er Bikes
    Replies: 7
    Last Post: 04-10-2011, 01:32 PM
  5. trustfire as cap for dyno
    By aljee in forum Lights DIY - Do It Yourself
    Replies: 2
    Last Post: 01-07-2011, 05:09 PM

Members who have read this thread: 18

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •