Folding Bikes - HammerSchmidt vs Schlumpf
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brakemeister
08-11-08, 09:10 AM
http://www.radfahren.de/modules.php?name=News&file=article&sid=4421&mode=&order=0&thold=0
hope this is the correct link.. this is the new Downhill SRAM crankset .. looks like it works similar to the Schlumpf ... this might be a great alternative for us folder peeeeeple
Thor
Sammyboy
08-11-08, 09:45 AM
That's in a quite significant degree of German. More so than I can read.
Google Translate link...
http://translate.google.com/translate?u=http%3A%2F%2Fwww.radfahren.de%2Fmodules.php%3Fname%3DNews%26file%3Darticle%26sid%3D4421% 26mode%3D%26order%3D0%26thold%3D0&hl=en&ie=UTF8&sl=de&tl=en
Unless I'm looking the wrong place, I see almost no information about what this actually does except in the vaguest terms. It seems like it may do something similar the schlumpf, which could be a good thing, but until they release some actual specs, it's going to be hard to make comparisons.
Now all we need is a leakproof oilbath chaincase and the 1890 Sunbeam will be re-invented :)
Hope it sells ok. I'll have to get one.
trueno92
08-11-08, 09:59 AM
this thing has been talked about for MONTHS. considering summer is ALMOST over, i think 2009 will be when it will actually be put into production..
If you are going to add the weight of a leakproof oilbath chaincase, just go with a shaftdrive.
A shaft drive will add about a pound, I can not imagine that type of chaincase adding less than that.
Could a leakproof chaincase stay leak free with a deraillier, or would you be restricted to a hubgear, like a shaftdrive is?
Would an oilbath chain have less drag than a dirty chain, but more drag than a clean chain?
A good shaftgear does not have anywhere near the 15% loss compared to a chain that some claim.
The shaftdrive will range from being less drag (light oil instead of grease in it and the hubgear) to maybe 5% more drag. It depends on which gear and the straightness of the chainline. Typically the shaftdrive have about 3% more drag. If the chain and gears are dirty, the shaftdrive is less drag.
I once owned a shaftdrive bike, I liked the shaftdrive, but not the rest of that bike.
I now have 2 bikes with hubgears and chaindrive.
I find that a chaindrive without a deraillier is almost as trouble free as a shaftdrive.
The shaftdrive is cleaner, has more ground clearance, is heavier, and costs more.