@Falco: News zu g-boxx, Nucleon TFR?

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Peter, hör wenigstens auf, dein Geseier immer in mehrere Posts zu zerlegen. Das nervt ja noch mehr als der Inhalt (den wohl eh niemand mehr liest).
 

Wirklich eine super Funktion in diesem Forum mit dem ignorieren, so macht das lesen dieses Themas wieder mehr Spaß.
Wenn die jeder hier für unseren Peter anwendet, dann bleiben seine Beiträge unbeantwortet und irgendwann zieht er dann vielleicht mal weiter.
 
Peter, hör wenigstens auf, dein Geseier immer in mehrere Posts zu zerlegen. Das nervt ja noch mehr als der Inhalt (den wohl eh niemand mehr liest).


wie wärs wenn du und die anderen einfach das umsetzen würden was sie angekündigt haben, das wäre wirklich eine hilfe, fein wäre dann noch wenn ihr reiseberichte und 2zeiler unterbleiben lassen könntet, dann würde es auch wieder um getriebebike gehen

und von drei auf alle schließen ist schon ein wenig größenwahn
 


ja vielleicht, aber da würde ich mich nicht darauf verlassen, also einfach ignorieren dann passt es schon und nur das machen was man ankündigt
 

...und langweilig ist er auch noch
 
Herrlich, diese Ruhe !
Jetzt isses wieder vorbei mit der Ruhe.
News zum Thema GATES Carbon Drive®:


GATES CARBON DRIVE INTRODUCES NEW, LIGHTER CENTERTRACK SYSTEM
posted by Tyler (Editor) - September 15, 2010 - 6pm EDT



PRESS RELEASE:
Gates Carbon Drive Systems, the global leader in bicycle belt-drive technologies, will introduce a new drive train technology at Interbike called CenterTrack, which promises to provide the lightest, strongest, cleanest and highest-performing belt-drive system ever created.

CenterTrack features an innovative new design that offers all the advantages of existing Carbon Drives but with a whopping 20 percent more tensile strength, a slimmer profile and the most advanced dirt- and debris-shedding ever. Gates will show the new drive train for the first time at Interbike’s Outdoor Demo, Sept. 20-21. The inventor and engineers from Carbon Drive Systems will be on-hand to answer questions and demonstrate CenterTrack’s attributes.

“CenterTrack is a quantum leap forward for belt-drive technologies. It offers all the clean, quiet and strong advantages of our existing drive trains but with an even higher level of performance,” says Todd Sellden, Director of Gates Carbon Drive Systems. “We believe it will become one of the bike industry’s must-have killer apps.”

CenterTrack features an ingenious advancement of the increasingly popular belt and pulley system that debuted at Interbike in 2007. Instead of a raised flange on the side, the front and rear pulleys of CenterTrack feature a narrow track that runs around the center of their circumference. The CenterTrack belt has a channel on its underside that fits snuggly onto the track for perfect alignment every time.



The CenterTrack belt’s teeth engage with the pulleys, whose sides have been removed for optimal debris shedding. Dirt and grime simply fall away, making CenterTrack technology ideal for muddy or snowy conditions. Gates will offer the CenterTrack technology on its new CDX-CT drive train, which will be the new premium component offering from Carbon Drive Systems. CDX-CT joins the CDX and CDC product lines.

CenterTrack was conceived by Wayne Lumpkin, one of the most innovative thinkers in the bike industry and the creative spark behind Avid brakes for many years. Gates and Lumpkin worked together to develop and test the CenterTrack technology and bring it to market. “My goal is always to create products that make bicycling easier and more fun for the user,” Lumpkin says. “I want cyclists to enjoy the ride without having to think about maintenance. CenterTrack achieves that goal.”



The new CDX-CT drive is the most robust bicycle belt-drive ever and offers advantages for both consumers and manufacturers. The pulleys are the slimmest ever produced, and this slender profile makes it easier than ever to integrate with internally geared hubs.

The cost of CDX-CT will be announced at Bike Week (Dec 5-8, 2010). Gates will take sample orders from bike makers at Interbike and will take production orders in December. CDX-CT will debut for 2011 on Spot Brand’s Acme Bike (displayed in the lobby of the Sands Convention Center at Interbike). The system will appear in widespread use on 2012 models, available retail in late 2011.

“The bike industry has a tradition of constantly innovating to improve the experience of the cycling public, and this is what Gates is doing with CenterTrack,” says Frank Scurlock, Global Business Development Manager for Gates Carbon Drive Systems. “Our goal is to make CenterTrack the drivetrain technology of choice for bicyclists who want nothing less than the best.”

 
Ist der Mittelsteg nicht etwas arg scharfkantig geraten und verletzt der so nicht auf Dauer die Zähne in der Mitte des Riemens? ...oder gehört das genau so?
 
Das bisherige GATES Carbon Drive-Design war offenbar doch nicht so optimal, wie es zunächst schien:

Responses to “New CenterTrack System from Gates is the Lightest, Strongest, Cleanest Bicycle Belt Drive Ever Created”

[FONT="]Dr. Eduard Burt, D.C., MUAC[/FONT][/I][FONT="] Says:
[/FONT][FONT="][URL="http://reviews.mtbr.com/interbike/new-centertrack-system-from-gates-is-the-lightest-strongest-cleanest-bicycle-belt-drive-ever-created/#comment-32286"]September 16th, 2010 at 12:09 pm[/URL][/FONT]
[FONT="]I hope this one will last much longer then the older version. My buddies on their Spots went back to chain drive. [COLOR=Red][B]Belt drive was slipping too much on steep climbs[/B][/COLOR]. The new model looks very clean. [/FONT][FONT="]Worth a try[/FONT].




 
Es wird besser, wenn jetzt noch eine kleinere Teilung und damit geringere Zahnhöhe kommt, sodaß die Riesenräder auf Durchmesser unter 140 mm schrumpfen, könnte man über einen Einsatz nachdenken.
 
Zumindest potentiell interessant für die G-Boxx 1 (leider mit zu großer Baubreite): "SHIFTEZY" PushButton Gear Shift von "EDSAN Automation Systems" (39 Linton Ave, Templestowe Lower, VIC 3107, East VIC, Fon +03-98505616).

Seit kurzem fertigt der australische Hersteller eine nachrüstbare elektronische Schaltung
für die ROHLOFF SpeedHub 500/14 in Serie und verkauft diese über eBay für $ 345 + $ 65 Versandkosten.

  • EXREMELY EASY TO FIT
  • TWIN PUSHBUTTON CONTROL
  • RECHARGABLE BATTERY WITH CHARGER INCLUDED
  • 600-1000 SHIFTS PER CHARGE
  • HIGH QUALITY PLANETERY GEARBOX SERVO MOTOR
  • NOW THE ROHLOFF HUB CAN BE FITTED TO ANY BICYCLE (INCLUDING ROAD BIKES)
  • WEIGHS JUST LESS THAN STANDARD CABLE SHIFT
Voraussetzung ist die Montage der externen Schaltzugansteuerung.
Please note:

  • The ShiftEzy Gearshift system requires the Rohloff External Mech attachement.(Part No 8216). Can be supplied for an additional US$110.00
  • Shiftezy has been designed and manufactured by Edsan Automation Systems independent of the Rohloff Company.
  • We have been enthusiastic users of the Rohloff Speedhub since 2001and consider it to be one of THE most significant inovations for the bicycle this decade.
  • Our ShiftEzy system was intially designed for Rohloff hub installations on recumbent and road bikes with standard drop handlebars.
  • It is now being fitted to touring bikes and many other types of bikes.
  • Due to unexpected demand, there will be a 10 day - 14 day delay in shipment from receiving payment.

 

Anhänge

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Solche Getriebe-Druckschalterbetätigungen (Push Button Gear Shifters bzw. Gear Changers) werden - auch abseits des Rennsports - z.B. von KLIKTRONIC für Motorräder angeboten.


 
... das würde mich auch interessieren. Auf diesem Foto einer Werksbesichtigung von AttitudeBikes vom 15.05.2009 sieht man zumindest ein gut gefülltes Regal ...



man kann es aber schon in gewissen bereichen abschätzen, denn das mini helius, von dem bis jetzt 20 stück nach asien gingen, ist ja im programm, die g-boxx 2 nicht, demnach dürften vom ion g-boxx 2 weit weniger als 20 bikes verkauft worden sein
 


na ja das klingt ja aber auch anders als konstante kettenstrebenlänge

ich habe die längenänderung ja nicht quantifiziert, sondern nur angemerkt, dass die kettenstrebenlänge nicht konstant bleibt
 
hast du da auch masse der pulleys und maße wie breite und göße der zähne des zahnriemens, ist das system leichter?
Bislang habe ich außer den Pressemeldungen, wonach das neue System u.a. 20 % dehnungsresistenter, leichter und weniger empfindlich gegen Schräglauf (Dank der umlaufenden, schmalen, mittigen Führung entlang der äußeren Pulley-Umfänge ["CenterTrack"] mit korrespondierender Rinne an der Innenseite des Zahnriemens) sowie Schmutz sein soll, keine weiteren technischen Informationen. Das neue "CenterTrack"-System (CDX-CT) soll als Premium-Produkt parallel neben den bisherigen Produktlinien (CDX und CDC) angeboten werden.

Offenbar ist CDX-CT noch so neu, daß sämtliche Test-Räder des GATES-Standes auf der laufenden Interbike, wo es erstmals öffentlich vorgestellt wurde, noch mit den alten Zahriemen ausgestattet waren.
 
Zuletzt bearbeitet:
Center Track Takes Center Stage

While it’s not yet in final production, the new CDX-CT system promises fitment for even more bikes. Instead of flanges on the pulleys to keep the belt in place, the center track kit uses just that — a track or spine down the center of the pulleys that fits into a groove in the center of the belt. The system is essentially self-aligning.
Even better, without the flanges on the pulleys, the system is 20-percent narrower and doesn’t require as much clearance between the front ring and frame, or between rear cog and back wheel. Put simply, it will fit more bikes without requiring them to be built especially for belt compatibility.
At the same time, the belt itself is made wider and therefore stronger. It can handle higher tension and as such, can be stretched across smaller pulleys. With smaller pulleys and no flanges, a CDX-CT system is about 50 grams lighter than the current CDX kit. Its total drivetrain weight including belt and both pulleys is just 190 grams.
While the CDX-CT system is not yet scaled up for full production, look for Gates to keep cinching belts on bikes that benefit from their simple and efficient drivetrains.


Read more: http://singletrack.competitor.com/2...-innovates-again_10468?pid=3452#ixzz10IptB7e9

sieht ja interessant aus, nur kann ich mir nicht vorstellen, dass dieses system mit Mittelsteg weniger anfällig für die Ausrichtung zwischen hinterem und vorderem Ritzel sein soll, denn so wie diese Prototypen aussehen, muss da alles sehr genau abgestimmt sein, die toleranzen scheinen ja nicht gerade groß zu sein

der zahnriemen sit breiter, das gesamtsystem aber schmäler, und 190 gramm gesamt ist schon eine ansage, sonst bringt ja schon die kette 250gramm auf die waage und kleinere pulleys zum bisherigen system sind auch nicht unbedingt ein nachteil

das problem der "weichen" bzw flexiblen zähne wird aber weiterhin bestehen, problem des überspringens ist also weiterhin gegeben, wenn das gesamtsystem bestehend aus zahnriemen, ritzel, rahmen, hinterbausteifigkeit, zahnriemenspannung usw nicht optimal abgestimmt ist

es wird also in naher zukunft noch schwierig sein, alle parameter so abzustimmen, damit das auch fürs mtb im gelände wirklich für jeden funktioniert, weil derzeit weiß ja niemand so ganz genau, warum es bei manchen funktioniert und bei anderen nicht
 
Zuletzt bearbeitet:
Informativer Artikel aus "singletrack.competitor.com". Wenn man dies hier liest ...


Belt-Driven Bicycles: New Standard or Just a Fad?
A belt-driven bicycle: it’s the next best thing. The progression of two-wheeled technology has brought many ‘next best things’ in all shapes and sizes. Remember GripShift and V-Brakes? A belt-driven bicycle doesn’t have a chain; at least not the one you might be picturing at the moment. Instead, a belt-drive (also known as a chainless bike or a poly chain) is actually one continuous piece of reinforced rubber that acts just like a standard roller chain. It’s relatively flat on the outside and has molded teeth on the inside. In essence, its design is very similar to that of a timing belt found in certain automobiles.
Perhaps one of the most curious aspects of the belt-drive system is the configuration of the poly chain with the frame of the bicycle itself. If you think about it, a typical roller chain can be disconnected to be threaded through the chainring and cogs before being reconnected. A belt, on the other hand, is a continuous piece of material that would be useless if broken. For chainless bicycles, the solution is a frame designed with a space (slot) at the junction of the seatstay and chainstay on the drive-side rear drop-out. During installation, the poly chain is pulled through this gap and then stretched around the drivetrain components. Once the belt is fit and tensioned, the gap is reinforced with a special bracket that bolts to the inner and outer sides of the drop-out. Although this split has the potential to compromise frame stiffness, manufacturers anticipated this deficiency and have compensated with innovative tube and frame designs.
Despite the recent trend of bicycles using this technology, the cycling community still seems to be divided on the topic of belt-drive systems. And rightfully so, a chainless bike has just as many positive aspects as it does drawbacks.
Pros - Although some hard-core cyclists may consider belt-drives a little gimmicky, they do have some obvious and surprising advantages.
Low Maintenance: Belt-drives require no lubrication. This makes them great for the serious commuter – no more worries about greasy pant legs.
Weight: Belt-drives are lightweight; a poly chain weighs right around 55-grams. Compare that to a typical chain that can tip the scales at 300-grams or more.
Strength: Reinforced with synthetic threads like carbon or Kevlar, recent designs have higher yield strength (break strength). This means that it’s easier to break a traditional roller chain than a poly chain.
Long Lasting and Economical: Poly chains have a longer life span than their roller counterparts, lasting somewhere in the neighborhood of 8,000- to 10,000-miles. This is significant for the hard-core, penny-wise cyclist.
Power/Efficiency: It has been said that pedaling power and efficiency can be lost when using a poly chain. Interestingly, there was a study released at the 2009 Interbike that revealed no loss in pedaling power and efficiency when comparing a traditional chain drive set-up to a belt-drive system.
Cons - Although belt-drives have the potential to be the ‘next big thing’, they are still specialized and work for only a select group of bicycle configurations.
One-Dimensional: Currently, it’s only possible to run a belt-drive system with a singlespeed or internal gear hub bicycle; derailleur systems are still in the research and development phase.
Specialized Components: Belt-drives require purpose-built components in order to wear properly. The most recent designs are either finished with a unique proprietary, skin-line coating or are manufactured with composite materials. This is necessary to counteract the wear than can occur between the contact points of the belt and the chainring/cog.
Climate Control: Weather can also be a factor with chainless bikes. I recently got some feedback from a colleague who is a dedicated commuter. She lives in Colorado and commutes year-round. One particular day, when the temperature plummeted into single digits, she ended up walking her bike home. Her poly chain had ‘frozen up’, losing most of its flexibility and managed to become totally ineffective.

Wherever you stand, chainless bicycles are most likely here to stay. The subtle nuances of belt-drive systems will most likely iron themselves out as the technology is refined and the concept is more widely accepted.
... wäre es auch interessant zu wissen, ob bei dem CDX-CT-Zahnriemensystem auch das bisher offenbar problematische Verhalten bei niedrigen Temperaturen verbessert worden ist.
 
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