Posts Tagged ‘hub’

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!

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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:

http://www.velovision.com/mag/issue29/vv29hubgears.pdf

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.

CUBE a german bicycle manufacturer released a Urban Bicycle Concept.

The result of the coperation with the University Coburg/Germany (Productdesigner Gregor Dauth, Professor Gerhard Kampe) shows a 28″ wheel folding bike.

Here are the main features of the concept:

  • CUBE has a sportive bicycle portfolio. So the customers are focused on a sportive urban bicycl concept.
  • The lightweight urban bike can easily carried into the flat and the working place.
  • Two folding links to fold the bike and transport for long distance travel (Car, train, plane)
  • Interesting to see that also here a internally geared hub with 8 speed is used (See also Cannondale Sram Projekt ONE with a Sram i-MOTION 9 hub). The hole drivetrain is completely capsuled. This protects the chain from rain, dust,….. I cannot understand that there are so many urban bicycles on the market who disregard this fundamental necessity! The HEBIE Chainglider is a revolutionary invention and nearly no bicycle maufacturer uses this fantastic part. Also in this bike concept the essential urban fenders are missing. Who wants to ride with this bicycle to work on a rainiy day! Sorry!!!! Maybe most of todays urban bikes are looking better without fenders and capsuled a drivetrain but when you face real world the cool design will not protect the designer cloth from getting dirty.
  • The 28″ rear wheel can be released out of the frame. The rear pinion gear and the rear brake disc rests on the frame. This means the rear wheel looks more or less like a front wheel. There are no additional parts on any side of the hub. This has the advantage, that no oil or dirt from the rear pinion gear can touch your clothes and it´s much thiner part to store.
  • Also interesting to see that the rear brake disc is mounted on the derailer side. This is the opposite side compared to actual bicycles. Do YOU have any idea why?

This urban bike concept is another proof how bright the future of internal geared hubs is. Check also the Bicycle Design Blog for a deeper sight…

The Shimano Alfine hubstrip is online.

The hub was part of a Downhill bike. I estimate that the hub was around 400km in use. All internal parts are greased with a white grease. Even the filigree ratchets which is very unusual. On a few pictures you´ll see metal dust on the white grease as a result of a massive metal abrasion. This is a normal process in the beginning of a hub life. The internal parts are new machined and do not fit perfect into each other. In the first kilometers of usage this “shake down” process produces a lot of metal dust. For a long hub life it´s important to clean an regrease the hub.

To optimize the efficiency of the hub it´s necessary to use grease and oil for the different internal parts. Shimano uses 100% grease inside the hub. This has the advantage of long maintenance intervals. The grease will last a whole hub life!

But the efficiency is bad. For sportive purpose like the Alfine is designed it makes sense to optimize the lubrication and have a one or two year maintenance interval. I my eyes it makes sense to use grease and special oil for the different parts inside the hub. It would not be possible to go for 100% like the Speedhub because of the hub shell / dust cap seal. This seal is not designed to prevent that the oil will leake out of the hub. There is a fantastic article from Chester Kyle and Frank Berto published in the Technical Journal of the IHPVA issue 52. (Also interesting to read is the feedback from Bernd Rohloff in the following issues. A great scientific showdown!)

“The grease in the Sachs 3 and the
Sturmey Archer 3-speeds was replaced
with light oil, and unlike the other hub
gear transmissions, the efficiencies of
the Sachs 3 and Sturmey 3, compare
well with the best of the derailleur
transmissions (figs. 7, 9, and 12).
Also, these transmissions were worn
in, whereas many of the others were
new. Manufacturers would do well to
replace heavy grease in their hub gears
with light oil. Although oil wouldn’t
last as long as grease, the energy
savings would be significant. Unfortunately
commuters have a tendency
to ignore maintenance until something
breaks, so light oil probably wouldn’t
be a popular choice. ”

I´ll give you feedback about my experience. One of my hubs is running since 7 month with special lubrication!

Check also movie 1 (original greased hub) and 6 (special oil lubricated hub) for the differences according ease of rotation.

Details are stored on the Alfine static page.

The Rohloff Speedhub has a own static page. With a lot of interesting stuff about the revolutionary internal gear hub.

  •  See also a customized Speedhub for the german Polizei

A detailed comparison about all available internally geared hubs is also available.

Check also the new informations about the NEW Rohloff hub for 2008!

The most sold internal geared hub in the world is now online on Hubstripping with a lot of top secret informations: The Shimano Nexus INTER-8!

How should I maintain the hub?

What is the difference between the standard SG-8R20 and the premium INTER-8 SG-8R25?

Did you know that your INTER-8 loves to bathe in oil?

Did you know that Shimano improved the sealing by changing the dust cap on the new models?

  • SG-8R27 (March 2007, english, Differences to January 2005, german and September 2006, english SG-8R25: Right Hand Dust Caps Parts 31, 44. Improved Sealing!)
  • SG-8R30 (August 2007, english, Interchangeability Overview between SG-8R20, SG-8R22, SG-8R30, SG-8R35, SG-8C20 and SG-8C22. Also details about the applicable Sprockets in Combination with the new Dust Caps)
  • SG-8R35 (August 2007, english, Interchangeability Overview between SG-8R25, SG-8R27 and SG-8R30. Also details about the applicable Sprockets in Combination with the new Dust Caps)
  • SG-8C22 (March 2007, english, Differences to SG-8C20: Right Hand Dust Caps Parts 26, 42. Improved Sealing!)

All the details are on the static Shimano Nexus INTER-8 HUBSTRIPPING page.

Which is the better hub? Shimano Alfine, Shimano Nexus INTER-8 or SRAM i-MOTION-9? Read the Internal Hub Gear Review!

Have fun!

First informations and pictures of the new i-MOTION 9 internally geared hub version.

The disc version:

The freewheel version:

The weight for both version is 1980gram. A lot of other facts according the i-Motion 9 and all new 2008 Comfort products are linked here!

The Shimano Alfine internal gear hub has it´s own hubstripping page. I decided to create for each hub a static page. The idea is to collect all relevant and interesting informations about the hub.

Please post on the different pages links which are hub relevant. I´ll add your links into the page. So here are the data I´ll collected over the last years about the Shimano Alfine. The greatest document is the service manual (in German) of the Shimano Nexus INTER-8 which is equivalent to the Alfine hub. There are a lot pictures which show all the hub details. Fantastic!

If your interested how the Alfine performs against other hubs read the Internal Gear Hub Review.

Have fun hubstripping!

Which is the best internally geared hub?

The following hubs are reviewed and compared on the new Hubstripping Review page:

  • Shimano
    • Nexus INTER-3
    • Nexus INTER-7
    • Nexus INTER-8
    • Alfine (8 Speed)
  • Sram
    • T3
    • P5
    • P5 Cargo
    • S7
    • i-Motion 3
    • i-Motion 9
  • Sturmey Archer
    • 3 Speed
    • 5 Speed
    • 8 Speed
  • Rohloff
    • Speedhub 500/14 (14 Speed)
  • Fichtel & Sachs
    • Torpedo Duomatic (2 Speed)
    • Torpedo Automatic (2 Speed)

The german bicycle magazine “Aktiv Radfahren” announces new Rohloff hub prototypes. On the Eurobike 2008 the german gear hub manufacturer will show first versions of a 14 gear hub with:

An overall gear transmition ratio of 580% (today 528%).

The hub shell will be 20% smaller.

The weight will be reduced from 1700g to around 1400g.

Rohloff will restrict the use for tandem and “hardcore” use for the Speedhub09.

The roadmap includes test in 2008 to 2009 . First versions will be shown on the Eurobike 2008 which can also include a new shifter. Sales release is not defined yet!
rohloff_new.jpg

Picture copyright ROHLOFF

More information about the Speedhub and a detailed review about all intern geared hubs on the market.