Chain slipping

[Gonzalez]

Ok looking to reclaim my thread now! checked the rear mech and there isn't much tension in the spring so maybe this is the problem. Anyone else running a short cage mech? got two of these hydrotechs and they both came with short cage mechs

 

[Anthony]

Just a quick aside question, if the cassette is worn and the chain is about 150 miles old, should I replace the chain at the same time as a new cassette or is 150 miles still bedding in?

Cheers

The chain should be fine, but you could measure it to be sure. If 24 links measure 12", it is new. If 24 links measure 12 1/8", it needs replacing. If 24 links measure 12 1/16", you could think about replacing it - replacing chains at 12 1/16" isn't really necessary, but if you do that then your cassettes and chainrings will last a lot longer.