Originally Posted by
Ozan Guner
My chain is Shimano CN HG53 which is compatible with deore derailleurs, why should i change it ? it is both compatible with the system i use and deore too. I'm thinking of getting a Shimano LX derailleur which has a 11-34 range, and get a sram pg 950 11-34 cassette.
When you change the cassette to the 11-34 you will need a longer chain to handle the larger cogs... the existing chain will be too short if it has been measured correctly for your current drive set up.
Measuring a new chain:
Wrap the chain around the largest chainring and the largest cog in the rear without running the chain through the rear derailleur, bring the ends of the chain together and from this point increase this by a pair of links to give you enough chain to handle the big / big combination.
The LX will handle the new drivetrain well and you cannot go wrong with the SRAM PG950 cassette.