I have used both and would go for 1/8 for strength and durability, although I did spend a couple of Winters on fixed training for road racing where I ran an 1/8 chain on 3/32 ring and sprocket and it was VERY smooth.
If I was doing it from scratch I would go 1/8.
@Zippie started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I have used both and would go for 1/8 for strength and durability, although I did spend a couple of Winters on fixed training for road racing where I ran an 1/8 chain on 3/32 ring and sprocket and it was VERY smooth.
If I was doing it from scratch I would go 1/8.