|   Sturmey Archer | FCC
Feb 14, 2002 6:12 AM | | I would like to build a second rear wheel for my SS using a hub off an english 3Speed($5. yard sale). I have a Bridgestone MB-3 that I have been riding SS for 2 years now but their are times when I would like extra gearing options (like pulling a child-trailer in Vermont).
I have a buddy who will machine parts to extend the width of the hub. Anyone else done this? any suggestions? Thoughts about using a singulator on this rig? |
| re: Sturmey Archer | jr
Feb 14, 2002 6:55 AM | | http://www.sheldonbrown.com/awfixed.html |
| same idea myself | WriConsult
Feb 14, 2002 10:54 AM | | Right now I'm about to undertake a completely different drivetrain project, but I think eventually I will want separate bikes for mountain biking and for winter commuting. When that day comes, I'm going to want something that's lower-maintenance in the Portland winter rains, but SS isn't an option for me with my bad knees and some of the hills we have. (My current commute is flat enough for SS, but I'm a consultant and who knows what the commute will be like to my next gig). So for me the PERFECT winter commuter would be my old rigid MTB outfitted with a 3-speed hub. Most of the drivetrain is out of the rain (these things are popular in England for a reason!), and then I can add a chaincover or case to minimize the need to constantly lube the chain. With my chainstay length I'd need a Singleator, but that's OK.
Don't know about hub width. SRAM's 3-speed comes in a 132.5mm hub for compatibility with both 130 and 135mm dropouts, but Sturmeys are narrower I'm not sure what is involved in modifying them. I'm sure what you're talking about is doable, but I don't know how it will affect durability.
I will also recommend a place that can do ANY work you need on that hub and knows exactly what they are doing, as long as you don't mind paying shipping both ways. The Bikesmith in Seattle specializes in internal hubs and custom projects. They even SELL the 2-speed fixed gear hub that Sheldon Brown talks about (from jr's post)! Here's the link:
http://www.thebikesmith.com/special.htm
- Dan |
| 3-speeder | DanO
Feb 14, 2002 11:38 AM | | I'm building up a 3-speeder on an ss frame right now. It should be good to go in a couple of weeks. Assuming I get it assembled in time, it's baptism will take place in Lawton, OK at the 12 Miles of Hell.
Stay tuned....
ps. Nothing is cooler than the S/A 2-speed kick-back! |
| Thinking on the same page... | jrm
Feb 15, 2002 7:34 AM | | The SA hub only comes with a 28H or 36H flange. but im real interested to find out if the sram 3 spd hub is availalbe in 32H?
Also are any of you guys planning on using the bikes on the dirt or stricty commuters. I'd like to know if the hub can hold up. Also how are you lacing them? |
| Thinking on the same page... | DanO
Feb 15, 2002 1:25 PM | | Mine is a Sachs 3-speed which is very close to the same design as the Sram T-3. I laced mine up to a 36 hole Volocity Aeroheat using 14/15 gauge spokes. The wheel built up nice and symetrical, just like a ss hub would. And yes, I plan to full-on off-road race, smash, crush, stomp, and otherwise use the hell out of it. |
| 7 years and still running! (with pics) | Mr. Johnsen
Feb 15, 2002 3:46 AM | | Hi! -I've been using this on my beater for 7 years now, and not one single problem except a worn out bushing in the brake-mechanism. The only modification I had to make was to change the axle-length to be able to run it in a 135mm frame. These axles's is fairly easy to come by here in Norway, but could be a problem in the states. I guess Sheldon Brown should have some information regarding this. With the axle lenght solved I had to make a short spacer of a steel-tube I had in the shop. So, as you can see it looks like h... But it plain works, and thats the beauty of it. Right now my old beater frame trashed, so I'm in the process of building up a new beater (or Café-racer as I prefer about this one). Have a look at the last pic, and you'll get an idea of how it'll look... Flat black is the color of choice of course!
Regards
Truls
Norway
The weel:
Drivetrain side:
Drivetrainside detail:
Brake side (left):
The Café-Racer:
.jpg) |
| similar to what I was thinking. | FCC
Feb 15, 2002 9:26 AM | | Thanks for the pictures. This is very similar o what I am looking to do. I am concerned with chain line and was thinking of fabricating something along the line of surley's 'fixxer'to extend the cog from the hub. |
| No need.... | Mr. Johnsen
Feb 15, 2002 10:35 AM | | -No need to do that much work. I got the whole thing running smoothly by shimming out the front ring with washers. That should work in most situations.
Truls |
| efficiency? | WriConsult
Feb 15, 2002 10:35 AM | | While we're on the subject and we're talking to someone who's used one extensively: how's the efficiency on the internal hubs? Obviously it's not gonna be as good as an SS, but is it much worse than a derailleur drivetrain? Can you tell the difference?
- Dan |
| Been discussed.... | Mr. Johnsen
Feb 15, 2002 11:09 AM | | It's been discussed more than once in the MTBR forums. Do a search for Rohloff in the search engine. You can also find information about efficiency at the Rohloff site (http://www.rohloff.de/). What is for sure is the fact that the old SA hubs are'nt the most efficient out there... -I would believe that internally geared hubs have developed a great deal since the grand days of the old SA (mine is from 1962).
Truls |
| perhaps, but ... | GlowBoy (was WriConsult)
Feb 19, 2002 12:34 PM | | ... I couldn't find much discussion of efficiency when I did the search you mentioned. I'm interested primarily in the efficiency of "modern" (i.e., new) SRAM or Sturmey-Archer 3-speeds. I'd seen the info on the Rohloff website before, but what I'm really interested in people's real-world experience with these things, and whether they notice the difference in efficiency, which is why I asked the question here.
I realize I'm responding a little late now that this thread has dropped off the front page, but just wanted to clarify my question.
- Dan |
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