While at the Show we had an interesting meeting with Alex Moulton who was there promoting his recently introduced AM series of suspended small wheel bikes. It was an interesting meeting for Mike and I as we had been selling a lot of the AMs and had, up to that point, sold more than any other dealer in the World except one in Germany. We were very enthusiastic about the bikes but had one major criticism, that being that the range of gears available with its single chainring set-up wasn’t suitable for loaded touring, particularly in mountains. We had modified a number of them with brazed-on front derailleurs and double chainwheels and also painted a few in brighter, more appealing colours than the standard grey. In fact Ian Austen was riding a bright yellow AM modified with a wide range of gears. Dr Moulton thought we were ruining his bike design and we got into quite a heated argument. He contended that his standard seven gears were ample for any type of riding. I often wonder if he would have changed his mind if he had seen the terrain we were to ride over in the following few days.
via Bicycle Specialties: A memorable ride in the Alps Part one.
Category: Gears
New Sturmey Archer Catalogue
Check out the new Sturmey Archer Catalogue for 2009/2010.
Lots of goodies including the S3X fixed gear, 3-speed, the new wide-ratio 8 speed hub and a variety of new shifter. You have, of course, seen all of these on Moultonbuzz previously!
Sturmey Archer S3X Fixed Gear 3 Speed Hub
Sunrace Sturmey Archer have published details of a new fixed-gear 3-speed hub, which is currently at the prototype stage.
The details are as follows:
- Overall gear range is 160%.
- Direct drive is 3rd gear, with reductions of 25% and 37.5%. This translates as gear steps of 20% and 33%.
- This The hub will feature a "much stronger aluminium hubshell".
- No details are given about shifters, but a "bar-end style shifter" looks a possibility.
The new S3X is a new interpretation of the Sturmey Archer ASC hub, which was a Fixed Gear 3-speed hub produced from 1946 to the late 1950s.
The S3X has a wider ratio than the ASC, which had an overall ratio of 133% (-25%, -10%, Direct).
Some links for information on the ASC hub:
The Sturmey Archer ASC 3-Speed Fixed-Gear Hub, from Sturmey Archer Heritage
The full Sunrace Sturmey Archer blog post is below.
Tuesday, September 2, 2008
S3X Fixed Gear 3 Speed
So I know there are many of you out there that are very interested in the little bit of info I recently got my paws on.The first batch of prototype Fixed Gear 3 speeds is finished. The new hub will be called the S3X. The hub will be made using a much stronger aluminum hubshell. Overall gear range will be 160%.
* 1st Gear -37.5%
* 2nd Gear - -25%
* 3rd Gear - Direct Drive
* Gear step gear 1 to gear 2: 20%
* Gear step gear two to gear 3: 33%
Shifters are still up in the air but we have had many requests for a bar end style shifter. Also we are still planning on the possibility of doing some anodized colors with laser etching instead of screen printed graphics. Please comment on what you would like to see in the way of shifters or color choices.
New "Silent" Hubs from Shimano
From VeloVision Online...
Alfine and Nexus 8 hubs get 'smooth' roller clutches instead of pawls...
Shimano have announced a change to their 8-speed internal gear hubs. Previously, like most such hub gears, they used a freewheel-like system of pawls to ensure one-way rotation of various internal parts:
This does of course create a clicking sound...
Now they've moved to roller clutches which are near-silent in operation:
These also offer, they say, quicker engagement, which should make shifting a little faster. This final image shows how the new hub internals use three of the roller clutches:
The 'smooth' hubs have new part numbers:
- for roller brake SG-8R31 (std), SG-8R36 (premium)
- with coaster brake SG-8C31 (std), SG-8C36 (premium)
- Alfine (for disk brake): SG-S501
New 8-speed Sturmey Archer Hub Gears
Sturmey Archer (or Sunrace Sturmey Archer as they are officially known these days) are at the International Bike Show in Taipei, and they're showing off a new 8 speed hub gear with a wider 325% range. This compares favourably with the 305% range on the current 8-speed. Pictured below is the disk brake version (X-RK 8), but it is expected to be available in the roller, drum and freewheel (no brake) versions also.
They are also bringing back a coaster brake version of the 5-speed hub gear. I'm a big fan of coaster brakes so I'm very happy to hear this. Currently, if you want a Sturmey hub with a coaster brake, you have to settle for a 3 speed.
A few new products that we are debuting at the show are the all new 8 speed hub as well as bringing the 5 speed coaster back into production. Both models offer a wider gear ratio with many internal changes.
All new 8 speed. 325% total range.
New 8 speed, disc side.
Closeup, new 8 speed.