rubez

I am trying to set up my rear gears.

I have tightened the cable into the derailleur - but I can't select the biggest cog or the smallest cog on the rear cassette... I can select everything inbetween.

I think my chain may be the wrong length, as I changed from a 6-speed to a 7-speed cassette, and also changed my derailleur from a Tourney to an Alivio.

Does the chain length have any bearing on this?

Or does it sound like another problem?

Thanks.