Chain Jumping

I have just relpaced my chain due to the old one being slightly stretched (Chain tool indicates it is still ok to use though). Unfortunately, now when in a couple of gears the chain is slipping. Could this mean I need a new cassette? I have only done about 2k miles on the bike so I would be disappointed if I did? Could I just need to re-tune my gears?
Any help would be great.
Thanks
Ben
Any help would be great.
Thanks
Ben
0
Posts
You could try tuning the gears, but IMO you probably need a new cassette.
I'm a bit annoyed though as I don't think it should wear out so quickly.
The strange thing is, it only seems to slip on a couple of the middle gears. I guess I use them more than anything else though.
Carbon 456
456 lefty
Pompino
White Inbred