the PC68 is an 8spd chain (3/32in) and single-speed cogs/rings are generally 1/8in. that may be giving you some trouble...
8 speed chains are not incompatable with SS cogs and rings. Indeed, I think it is entirely possible that the 8 speed chain is the most common among single speeders.alexrex20 said:the PC68 is an 8spd chain (3/32in) and single-speed cogs/rings are generally 1/8in. that may be giving you some trouble...
i use a pc58 8spd on my SSDirdir said:8 speed chains are not incompatable with SS cogs and rings. Indeed, I think it is entirely possible that the 8 speed chain is the most common among single speeders.
Regardless, it could easily be the worn chainring + new chain/new cog combo. Try a new chainring before trying anything else.