.....the riders are always going forward, never leg braking,
1/8 chain is far stronger than you think
3/32 are more than strong enough as well.
you need a 3 piece link with the circlip
The pins have got a roller around them so strength is about the same, the 3/32 pin doesn't get stonger because it's shorter, engagement of the pins into the side plates is about the same, possibly a bit greater with a 1/8 chain.Keeping everything else the same (e.g. material properties) a 3/32" chain will always be stronger than a 1/8" chain. The pins in a 1/8" chain are longer, so the bending moment on the pins will always be higher. For this reason (and also because there's so much more choice in the 3/32" world) I'll always use 3/32" on my fixed wheel bike.
I use a proper fixed/ss chain and it has one of these 3 piece links. I don't think I'd use anything else as I think the three piece link is the correct part for the job. However, having said that, a few years ago I tried the experiment of riding an SRAM PC850 on my multi-geared commuter until it broke. Rather surprisingly it broke on a regular link rather than at the quick-link, so it appears that the rivetting on the quick-link is much stronger. I think SRAM, or one of the other chain manufacturers actually say on their website that if all links were made and rivetted to the same strength as a quick-link it would be impossible for us to shorten a chain using 'normal' non-industrial tools.
If anyone wants to see pictures of the chain I rode to death I'll post them up!
What possible justification is there for not having a lockring on a road-based fixed gear bike?
3/32 are more than strong enough as well.
Are you seriously using a powerlink? an actual power link if that's what you are using isn't safe at all...
A lot of track bikes don't use em. I think the UCI banned the use of lock rings in 2005 ?