Der starre Antrieb ist bestimmt belastender:
- man tritt immer (also auf 1000km am Fixie hat man sicher mehr Kettenbewegung als am Freilaufrad)
- wechselnde Belastung durch Bremsen
3/32" soll lt. div. Internetquellen besser halten.
"Chain
Chains are pretty well undertood these days. See the sidebar for excellent chain primers from Sheldon Brown and Greg Goode. But I do want to shed some light on a long-running discussion. 1/8" or 3/32": which is better?
My preference is for 3/32", for the following reasons.
Wide choice of components
It was once the case that track cogs were 1/8", but these days 3/32" cogs are available in all sizes. Build a 3/32" drivetrain and you have access to the widest possible range of chainring sizes and drillings, not just the 144mm BCD stuff favoured in the track world. And, in an emergency, you can always put a 1/8" chain onto your 3/32" chainring and cog. The reverse definitely isn't true.
Better lateral flex
Since it was developed for gearies, 3/32" chain deflects better than 1/8". That might not sound important in one-gear applications but -- believe me -- it can be important if you're riding a lightweight, flexible frame at high RPM on rough terrain.
Stronger
Over the last 30 years, manufacturers have concentrated their development efforts on making the narrow chains required for geared bikes. Features like bushingless assembly, beveled sideplates, and high pin pressure are all pretty much 3/32" specific.
I run a SRAM PC-48, the most basic Sachs 8spd offering, without any problems. I reckon to replace it maybe two or three times a year. To get the most out of the chain, I clean it regularly (a Powerlink comes in handy here) but I don't spend money on it. It seems silly to spend lots of money on a part that, by design, is supposed to be replaced regularly. Keep it simple and somewhat on the cheap!"
http://www.63xc.com/mattc/setup2.htm