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.
Peter Eland from velovision.com has written an interesting article about internal geared hubs.
Here is his conclusion:
CONCLUSIONS
It’s great to see internal gear hubs developing to
the extent we’ve experienced in these reviews. The
Alfine in particular has the ease-of-use and style to
charm everyday riders away from derailleurs and
to introduce them to the low-maintenance joys of
hub gearing. The SRAM too is a user-friendly hub,
but perhaps more aimed at the performance rider
who will appreciate the wider, more even spread of
gears and won’t mind the extra cost.
The Rohloff is in a different league in every
aspect: range, price, tandem rating and quality.
It shifts reliably but not quite as smoothly as the
Alfine, and the lower range noise is irritating, at
least on a non-worn-in hub. But it’s still the only
truly wide-ratio hub gear, and many will find it
well worth the money. Strong riders who break
other hub gears may well end up with the Rohloff
too, as the only hub they can’t destroy.
The NuVinci was a very pleasant surprise
– a novel transmission which really works. Yes, it’s
heavy, and perhaps a bit draggy, but it’s bomb-
proof and super easy to use for non-mechanically
minded riders: a welcome addition to the hub gear
world and one which deserves to do well.
More details can be found here:
There are a lot of unnecessary inventions. But these my hubstripping friends is a fantastic invention for the internal hub community!A excentric bottom bracket for standard bicycle frames!!! This means it´s not necessary anymore to have horizontal dropouts or a kind of rear chain tensioner. The “Exzentriker” from Trickstuff will widen the variety of bicycle frames for internal geared hubs enormously. You can use the bottom bracket with single speed cranks (24mm axle diameter like Shimano Hollowtech II standard).
Here is the link for more (german) details. The “Exzentriker” is available. The price is 149,- Euro.
The Cannondale Bad Boy bicycle was the fundament for this new bicycle: Cannondale RAW 
Plus:
- Shimano Alfine internal geared hub in combination with custommade coloured cranks in 26″ wheels .
- Fantastic looking Vredestein tyres.
- All bicycle parts manufacturer names are removed from the parts. (Except Brooks!)
- Extremly stylish!
Minus:
- The chain fender is not capsuled.
Read here what the producer says:
URBAN UNIVERSE
Our world is in transition.
We are now more mindful of the planet’s resources. No matter which age, sex or society we belong to, we make our choices more consciously then ever.
Riding a bike is a choice. In fact, cycling is an attitude. the bike itself is a statement about its owner.
Finally, here is one of the first available pictures which show the new Shimano Nexus Inter 3 Speed hub.
Copyright: Daniel Fikuart
Shimano product manager Florian Nebel sees trendy urban bike concepts, Crusiers and children bicycles as the focus market for this hub. Focus region is the USA! Source is the german bicycle Magazin “ Aktiv Radfahren “. See also this post about the first realized bicycle concept from Specialized with the Inter-3.
The swiss bicycle manufacturer KATZ-Bikes has one objective: Maintenance Free Bicycles!
Here is the first concept for a maintenance free MTB.
The drivetrain consists out of a Rohloff Speedhub in combination with a completely capsuled chain drivetrain. The rear wheel can be removed without touching the chain. This is realized by a special couppling between the internal geared hub and the rear pinion gear. The rear pinion gear stay on the bike and is a part of the drivetrain.
The efficiency is pushed by the following details to a high level:
- capsuled drivetrain
- the chain has a wide overlapping on the chain wheel and the rear pinion by using to little guiding pinions. These two guiding pinions are on the untensioned side of the drivetrain with a low influence on the efficiency. The tensioned upper chainline has a straight effective direction!
- the chain will be tensioned by the two guiding pinions (like a derailleur).
There is a whole bundle of maintenance free details on this bike concerning other parts. A price is not defined but the bikes will be available next spring. Phil´s veloblog is also discussing the benefits of this concept.
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