New cassette & chain, now getting vibrations in pedals

[da_guy2]

This weekend I just replaced my chain and 7 speed cassette as they were both quite worn out. Everything seemed to go OK, but now I'm noticing a vibration in my pedals, but only when I'm pedaling.

I was wondering if maybe something is slightly different with the alignment of this cassette vs my old one , and now the chain is rubbing somewhere? Or maybe my chain rings are worn and the new chain might be rubbing on them?

Any ideas?

Thanks

[bobtravers]

For sure, take a look at your chainrings...

Also be sure that your pedals are completely screwed in the crankarms

[RobAR]

Bob. You said "For sure". Are you kin to Pat Travers or Tom Petty?

Guy2 - Road bike? Mtn bike? Maybe even some other big-time info?

[nfmisso]

Is it the same vibration in every gear? Are one or more different?

Is it an indexed rear derailleur or friction shift?

On an indexed unit; I had a Shimano 14-28 freewheel that I could tune to run smooth in 1,2,3,4,6,7 but not in 5th; OR in 5th and not the other gears. Measured the ____ thing, and found the the 4-5 spacing was a bit narrow and the 5-6 spacing a bit wide. Haven't purchased Shimano freewheels or cassettes since - SRAM and DNP cassettes and Sunrace freewheels - all have proven to be good for me

[nfmisso]

Also; your chain ring could be worn.