Bad vibes maaaaaan

I've just put a new chain on and am experiencing what would best be described as a fine vibration through the pedals. The chain is the same brand but a different model to the last one.
Is this to be expected as the old chain and cogs will have presumably worn to each other or should I be worried?
Cheers.

I assume you've not changed the rear cog? If so, then yes, it is to be expected as the cog will have worn with the chain.

Yeah same old cogs.

I wouldn't jump to that conclusion, a good quality CNC stainless sprocket will last thousands of miles whereas a 1/8" might be passed it at 1000. I've had this with 100% brand new drivetrain and it goes with a little lube or just a little time for the factory lube to get into all the right places. After all that, if it was one of those £3-4 pressed steel sprockets then it has to go - just have a look for wear ('shark fin stylee') on the teeth.

keep riding. i put a new chain on my bike on saturday and it sounded like a train. it's now nice and quiet.

I wouldn't jump to that conclusion, a good quality CNC stainless sprocket will last thousands of miles whereas a 1/8" might be passed it at 1000. I've had this with 100% brand new drivetrain and it goes with a little lube or just a little time for the factory lube to get into all the right places. After all that, if it was one of those £3-4 pressed steel sprockets then it has to go - just have a look for wear ('shark fin stylee') on the teeth.

That doesn't make any sense at all? CNC is a method of manufacturing and 1/8'' is a diameter of chain.

I think what he's trying to say is a cheap shit pressed sprocket will last for fuck all and you need to change it (and possibly your c/ring) when you change chains.

If you get cnc machined 1/8th OR 3/32' sprocket and chanring + decent quality chain it will last a lot longer.

Never rule out AIDS.

I've just put a new chain on and am experiencing what would best be described as a fine vibration through the pedals. The chain is the same brand but a different model to the last one.
Is this to be expected as the old chain and cogs will have presumably worn to each other or should I be worried?
Cheers.

Fine vibration can mean you've simply got the chain too tight - or, if the chainring is slightly off centre on the spider you can get a tight spot on the chain. Test the chain tension with the pedals at different positions to rule this out.