On a Cycle-show 2009 S&A showed a 2 Speed kickback hub with a coaster brake like the DUOMATIC from Fichtel&Sachs.
Details can be found on MOULTONBUZZ.com ….
and road.cc
Shimano announces a 11 gear hub. The range will be 409% (Alfine 8 gear 307%). The hub runs in a oil bath like the Rohloff Speddhub. This should result a higher efficiency and longer lifetime. The price will be 300,- Euro release data is September 2010.
Finally a big gap for the use of internal geared hubs on road bicycles is closed. The first STI road shifter for the Shimano ALFINE and Nexus hubs is available
The company who provides the lever is called Sussex Enterprises. More informations can be found here!
Thanks Detlef for this valuable information!
A Klapprad named “Vaterland” with a Duomatic hub plays the main role in this short movie…
I received pictures about another DUOMATIC bicycle Project. Quite often it´s necessary to space the internal gear hubs to fit them perfect in the dropout width of the frame. Here is a picture of John´s solution:
“Attached is a photo of a washer/spacer I made for my duomatic R2110. It is made of soft aluminium so the teeth on the right-side cone of the hub will grip into it. The two milled flat surfaces will fit into the frame dropout, so it does not rotate. With this washer I have been able to space the R2110 hub to 120mm (same as a standard track frame) without any issues of the axle spinning. Note that the photo shows the washer in an unfinished state – I still had to drill out the central hole so it fits over the axle.”
Finally a picture of the actual bicycle status
Thanks John for sharing your NTWD “Non Turing Washer Design” for the DUOMATIC hub.
I recieved this link from John Isles. Thanks a lot!
I like this T-shirt don´t know why!!!!!
The backsite is real hubstripping!
Last weekend I visited the SPEZI and met the guys from SIMPLE.ch. SIMPLE is a swiss bicycle manufacturer who developed a carbon belt driven premium bicycle. The SIMPLE bicycles are designed to reduce the maintenance level to a minimum. So it´s a logical approach to use the carbon belt instead of a standard chain. The advantages for city cyclist are:
- No dirty trousers anymore because of chain oil!
- No need to oil the chain. Less maintenance!
- New design possibilities. The chain case is reduced to a stylish spoiler!
The modifications on the bicycle frame are minimal. A srew on the rear chainstay allows you to open the frame and to put the carbon belt inside the frame triangel. The SIMPLE bicycle has a mechanical sled on both sides of the dropout to adapt the distance between bottom bracket and rear dropout. This makes it easy to fit in the belt the first time. In case of a flat tire the sled is not needed because there is no big tension on the belt. The depth of the tooth is so high that it accepts a low tensioned belt.
Here you see how powerfull this drivetrain is:
The optional hubs are the Speedhub from Rohloff and the SHIMANO Alfine.
During the testride I noticed via my legs a smooth feeling! Let´s see how the longterm behavior ot the belt will be!
The days of the steel chain are numbered. First we´ll see a replacement in the premium city and touring bicycles. Because of the price and the customized frames. But prices for the belt will fall and the bicycle mass market will absorb a new technology!
Other drivetrain alternatives are discussed in this video… (sorry only in swiss language!).
Using a Nexus or Alfine internal gear hub from Shimano with a drop bar or a road style handle bar was not possible. The problem were the available shifters. Jtek a engineering company from Hugo, MN has developed a bar-end shifter. The shifter is very light which hopefully has now influence for his lifetime. From the distance it looks like the main parts are made out of aluminium. Also the design locks rigid! The clamping part needs a 24mm bar diameter.
Thanks to Bob for this information!
Please have a look at this bicycles! It´s the bicycle of Bob Davies. Some details I´ll mention:
- spacer between the hub and the rear drop out of the frame
- the painted chain
- the little bras spoke washers
This is real bicycle fetish!
Hi.
I haven’t posted here until now. Lets hope I’m not way off track, and that I am not covering old ground.
This is a quick one for those of you that have hit a brick wall trying to understand how a 3 speed hub actually works.
There are quite a few bits inside an internally geared hub. They can seem a bit daunting. This site gives some insight into what you can expect to find. But what about the fundamentals?
A 3 speed hub basically only contains ONE gear.
This is one reason why they are so reliable, and such a masterpiece of engineering.
One gear is cleverly controlled so that it is possible to switch input and output.
In addition to this, a “locked” or 1:1 (input = output) standard freewheel option is included.
With the one gear, plus the direct drive, 3 gears are available…
For arguments sake lets say that the one gear gives a 3 to 4 ratio, (hubs differ).
By swapping input and output on the one gear it is possible to achieve either a 3:4 ratio or a 4:3 ratio. When 1:1 is added you have 3 gears.
4:3, 1:1, 3:4. It’s that simple.
The internal workings of the hub are designed to control input and output around one gear, and to eliminate that gear to give you a 1:1 ratio.
So if you have been looking at the guts of your hub wondering where the 3 gears are, you are on the right track. They aren’t in there.
Ben Skinner, Hjulcompaniet.
It looks like that the belt technology breaks into the bicycle world. There have been many attemps to create a belt system which can replace a chain. They all failed! But now we see some of the big bicycle manufacturer using the belt drive…
The refernce according belt drive systems comes from Gates. A company who owns a broad belt portfolio mainly for industrial applications.
Their product is called GATES Carbon Drive.
This issue was already discussed at Bicycle Design.
Dobbybrain shows a beautiful TREK bicycle.
German magazin Aktiv Radfahren has a picture of Nicolai Argon TR bicycle.
And finally the single speed guys from Karlsruhe / Germany try the belt.
Intresting to see on all the frames is the possebility to open the rear dropout to put the belt into the frame triangle. Let´s see which version will be the future standard.
All of them use the Gates system!
The guys from velojournal had the chance to test the Cannondale “On” concept. Here are the results in brief
- The Sram i-motion internal gear hub offers always the right gear. But with luggage and on long climbs gears with small ratios are missing!
- The chain is perfect capsuled.
- AVID disc brake performance is good
- Front suspension performance great (Lefty!)
- The folding mechanism was not realized and could not be tested
- No rear suspension
- Fenders missing
- Carriers missing
There are still some lacks to close for this bicycle concept. But based on design it´s a big step forward!
The bicycle will be produced in two years. The price will be around 6000 Euro!
..
Here is the “Google translation link” in English.
Here the original link to german text.
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