Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-04-11, 12:06 PM   #1
chagzuki
Senior Member
Thread Starter
 
Join Date: Jul 2008
Bikes: Brompton, Dahon Vitesse D5
Posts: 1,867
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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?
chagzuki is offline   Reply With Quote
Old 04-04-11, 12:34 PM   #2
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 18,086
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Anyone know the .., gear ratios .. ?
http://sheldonbrown.com/gears/internal.html
fietsbob is offline   Reply With Quote
Old 04-04-11, 02:26 PM   #3
rcschafer
Senior Member
 
rcschafer's Avatar
 
Join Date: Feb 2008
Location: New Orleans, LA, USA
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: 251
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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
rcschafer is offline   Reply With Quote
Old 04-04-11, 03:49 PM   #4
chagzuki
Senior Member
Thread Starter
 
Join Date: Jul 2008
Bikes: Brompton, Dahon Vitesse D5
Posts: 1,867
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks, not seen that website before, very useful.

So it only came in brake versions?
chagzuki is offline   Reply With Quote
Old 04-04-11, 06:07 PM   #5
Dynocoaster
Senior Member
 
Join Date: May 2004
Location: Pacific Northwest
Bikes: Too many....................
Posts: 3,075
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
My Mezzo doesnt have a brake integrated with the hub.
Dynocoaster is offline   Reply With Quote
Old 04-04-11, 06:12 PM   #6
chagzuki
Senior Member
Thread Starter
 
Join Date: Jul 2008
Bikes: Brompton, Dahon Vitesse D5
Posts: 1,867
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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.
chagzuki is offline   Reply With Quote
Old 04-04-11, 06:47 PM   #7
Dynocoaster
Senior Member
 
Join Date: May 2004
Location: Pacific Northwest
Bikes: Too many....................
Posts: 3,075
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Are you interested in the I4 or the Mezzo with an I4?
Dynocoaster is offline   Reply With Quote
Old 04-04-11, 07:59 PM   #8
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 18,086
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
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.
fietsbob is offline   Reply With Quote
Old 04-05-11, 12:36 AM   #9
folderfan550
Senior Member
 
Join Date: Dec 2005
Location: Illinois, USA
Bikes:
Posts: 104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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.
folderfan550 is offline   Reply With Quote
Old 04-05-11, 02:19 AM   #10
chagzuki
Senior Member
Thread Starter
 
Join Date: Jul 2008
Bikes: Brompton, Dahon Vitesse D5
Posts: 1,867
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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.
chagzuki is offline   Reply With Quote
Old 04-05-11, 05:44 AM   #11
rcschafer
Senior Member
 
rcschafer's Avatar
 
Join Date: Feb 2008
Location: New Orleans, LA, USA
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: 251
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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.
rcschafer is offline   Reply With Quote
Old 04-05-11, 01:45 PM   #12
bhkyte
Senior Member
 
bhkyte's Avatar
 
Join Date: Sep 2008
Location: York UK
Bikes: 2X dualdrive Mezzo folder,plus others
Posts: 2,777
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Most mezzo i4 users report than its still under geared.
bhkyte is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 04:32 PM.