Advertise on Bikeforums.net



User Tag List

Results 1 to 12 of 12
  1. #1
    Senior Member
    Join Date
    Jul 2008
    My Bikes
    Brompton, Dahon Vitesse D5
    Posts
    1,799
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Shimano Nexus 4 speed hub / Mezzo I4

    When was the 4 speed hub discontinued? I can't find much info on it on the web yet Mezzo appear to continue to use it on one of their bikes.

    Anyone know the specs, gear ratios/weight?

  2. #2
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    39,779
    Mentioned
    25 Post(s)
    Tagged
    0 Thread(s)
    Anyone know the .., gear ratios .. ?
    http://sheldonbrown.com/gears/internal.html

  3. #3
    Senior Member rcschafer's Avatar
    Join Date
    Feb 2008
    Location
    New Orleans, LA, USA
    My Bikes
    '59 Raleigh Lenton, '86 Peugeot PSN-10 Triathalon, '84 Peugeot PGN-10, 8? Peugeot UE-18, Peugeot NS-540, '86 Giant Iguana (Xtracycle), Holdsworth Gemini tandem, Surly Cross Check fixie, '86 Centurion MV Ironman
    Posts
    229
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You can still find installation and maintenance PDFs on the Shimano site that appear to cover everything except what you're asking

    Wait, here you go: Gear Hub Specs

    Gear Ratio: 1.00 (1st), 1.244 (2nd), 1.50 (3rd), 1.843 (4th)
    Weight: 1700g for the Nexus SG-4C35 (coaster brake), 1370g for the Nexus SG-4R35 (roller brake.)
    Last edited by rcschafer; 04-04-11 at 02:31 PM. Reason: Found additional info

  4. #4
    Senior Member
    Join Date
    Jul 2008
    My Bikes
    Brompton, Dahon Vitesse D5
    Posts
    1,799
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Thanks, not seen that website before, very useful.

    So it only came in brake versions?

  5. #5
    Senior Member
    Join Date
    May 2004
    Location
    Pacific Northwest
    My Bikes
    Too many....................
    Posts
    3,064
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My Mezzo doesnt have a brake integrated with the hub.
    Dahon Jifo
    Dawes Kingpin 2speed

  6. #6
    Senior Member
    Join Date
    Jul 2008
    My Bikes
    Brompton, Dahon Vitesse D5
    Posts
    1,799
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I'm not really following Shimano's product range system. The Nexus 7 hub seems only to come in coaster or roller brake format too. . . whereas the 8 clearly has 3 permutations, one specifically for rim brakes.

  7. #7
    Senior Member
    Join Date
    May 2004
    Location
    Pacific Northwest
    My Bikes
    Too many....................
    Posts
    3,064
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Are you interested in the I4 or the Mezzo with an I4?
    Dahon Jifo
    Dawes Kingpin 2speed

  8. #8
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    39,779
    Mentioned
    25 Post(s)
    Tagged
    0 Thread(s)
    Gear Ratio: 1.00 (1st), 1.244 (2nd), 1.50 (3rd), 1.843 (4th)
    Does sound like a good small wheel bike IG hub, set up the sprocket ratio for low
    and the overdrive gears make all the higher gears.

  9. #9
    Senior Member
    Join Date
    Dec 2005
    Location
    Illinois, USA
    Posts
    104
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The roller brake is a separate unit which bolts onto the left side of the hub. The brake engages with splines on the hub. The Nexus 4-speed and 7-speed hubs use the same types of roller brake. I have a bike which came with the Nexus 7-speed and rim brakes. I later added a roller brake to replace the rear rim brake. Some hubs with no roller brake came with a plastic cover that fits over the splines.

  10. #10
    Senior Member
    Join Date
    Jul 2008
    My Bikes
    Brompton, Dahon Vitesse D5
    Posts
    1,799
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I'm interested in the hub, Dynocoaster. I mention Mezzo as it seems the hub is still in use for those bikes only, and I figured there must be Mezzo riders on this forum who have the 4 speed model and can offer opinions on the hub.

    I guess that means that the weight disparity, 1700g for coaster vs 1370g for roller, is due to the fact that that doesn't include the roller brake unit. . . in which case it's not a particularly light hub.

    But otherwise it does sound good for folders; evenly spaced gears and allowing the usage of a small chainring.

  11. #11
    Senior Member rcschafer's Avatar
    Join Date
    Feb 2008
    Location
    New Orleans, LA, USA
    My Bikes
    '59 Raleigh Lenton, '86 Peugeot PSN-10 Triathalon, '84 Peugeot PGN-10, 8? Peugeot UE-18, Peugeot NS-540, '86 Giant Iguana (Xtracycle), Holdsworth Gemini tandem, Surly Cross Check fixie, '86 Centurion MV Ironman
    Posts
    229
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I installed the coaster brake model on a mixte and am happy with it; even with 700c wheels it's still a pretty usable range of gears (it's very flat where I am.)

    One note: the Nexus-4 shifters are a little harder to find these days and don't typically come with the hub. I have a trigger shifter and it works well on upright bars; the twist shifters are more common (there's one on eBay now for $30 but I read somewhere that they might be less durable.

  12. #12
    Senior Member bhkyte's Avatar
    Join Date
    Sep 2008
    Location
    York UK
    My Bikes
    2X dualdrive Mezzo folder,plus others
    Posts
    2,204
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Most mezzo i4 users report than its still under geared.
    Dual drive Mezzo (GOLD), Dual Drive Mezzo with bullbars (black), White Brompton thingy with Dahon Androes stem and bull bars. Birdie (old sytle) 7 speed. Downtube NS8.

Posting Permissions

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