Dual hub shift
04-06-21, 08:31 AM
#1
Senior Member
Thread Starter
Join Date: Oct 2013
Location: Mich
Posts: 7,354
Bikes: RSO E-tire dropper fixie brifter
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 2,946 Times
in
1,906 Posts
Dual hub shift
I'd give it a go, especially if the claims are 90% accurate.
__________________
-Oh Hey!
-Oh Hey!
04-06-21, 07:45 PM
#2
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,779
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3583 Post(s)
Liked 3,395 Times
in
1,929 Posts
Internal gear hub adapted to modern cassette and disc brake systems. Have they addressed the higher internal friction of hub gears?
04-06-21, 08:52 PM
#3
Senior Member
Join Date: Feb 2015
Location: Mission Viejo
Posts: 5,801
Bikes: 1986 Cannondale SR400 (Flat bar commuter), 1988 Cannondale Criterium XTR, 1992 Serotta T-Max, 1995 Trek 970
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1943 Post(s)
Liked 2,164 Times
in
1,323 Posts
Pretty amazing. With a 46t chainring and an 11-34 you can cover everything with no wrap concerns or chainline issues. And shift under load at any time.
John
John
04-06-21, 08:59 PM
#4
Senior Member
Join Date: Dec 2019
Location: South Shore of Long Island
Posts: 2,785
Bikes: 2010 Carrera Volans, 2015 C-Dale Trail 2sl, 2017 Raleigh Rush Hour, 2017 Blue Proseccio, 1992 Giant Perigee, 80s Gitane Rallye Tandem
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1079 Post(s)
Liked 1,019 Times
in
719 Posts
Old concept, had a sram 3sp internal with 8sp cassette body meaning it could handle a 10sp one they came out. Problem was the sturdiness of the internals to shift under load and the internal friction. I'd guess the 2x could be built more robustly and have less friction, with modern gearing it does make sense to be able to do this and with the right ratios could take the place of the crank. But cost and weight of the hub are going to matter.
04-07-21, 05:41 AM
#5
Senior member
Join Date: Oct 2004
Location: Oakville Ontario
Posts: 8,115
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 942 Post(s)
Liked 656 Times
in
370 Posts
A new take on an old idea. 30 years ago, the Sachs Orbit used the same concept. A 2 speed internal with a multi cog cassette. I built a bike with one of those just a few weeks ago.
04-07-21, 06:08 AM
#6
Senior Member
Thread Starter
Join Date: Oct 2013
Location: Mich
Posts: 7,354
Bikes: RSO E-tire dropper fixie brifter
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 2,946 Times
in
1,906 Posts
Imagine a compact triple with that hub. You'd have mountains crumbling & descent treated like a plateau.
__________________
-Oh Hey!
-Oh Hey!
Likes For Troul:
04-07-21, 09:19 AM
#7
Senior Member
Join Date: Apr 2010
Location: Elevation 666m Edmonton Canada
Posts: 2,475
Bikes: 2013 Custom SA5w / Rohloff Tourster
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1233 Post(s)
Liked 318 Times
in
245 Posts
Besides that, the way the hub is stretched to inside the cluster, I think would spread the bearings and strengthen things. There is also savings with not having the front deraileur clutzing around.
Last edited by GamblerGORD53; 04-07-21 at 09:27 AM.
04-08-21, 10:22 AM
#8
Senior Member
Thread Starter
Join Date: Oct 2013
Location: Mich
Posts: 7,354
Bikes: RSO E-tire dropper fixie brifter
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 2,946 Times
in
1,906 Posts
With the ability to shift under full torque & not risk breakage, that supports the moving inward to increase strength.
__________________
-Oh Hey!
-Oh Hey!
