upgrading to 10 speed rear derailleur

leehigginbottom

Hi All,

My current 9 speed derailleur finally gave up at the weekend, So I am looking at getting a replacement. I keep hearing good things about 10 speed derailleurs and are considering upgrading to a Shimano SLX M675 Shadow+ 10 Speed Rear Mech. I understand that I will have to upgrade the following but I am after some advice on what to get for this derailleur.

I know I need to upgrade the following
- Rear derailleur - Shimano SLX M675 Shadow+ 10 Speed Rear Mech - medium or long cage?
- Rear cassette - but which one? I am looking at Shimano SLX HG62 10 Speed MTB Cassette but do I get the 11-34 or 11-36 option.
- Rear shifter - Will any do as long as it is a 10 speed? does it need to be an SLX to match.
- Chain - What 10 speed chain would you recommend.

Any thoughts and suggestions would be great.

Thanks

Lee

leehigginbottom

Also on the chain how many links would I need?

Thanks

Lee

cooldad

Mech - whichever has the capacity for the range you are running - will be on the sellers site or techdocs. Range = (big ring - small ring) + (big cog - small cog)
Shifter - any Shimano.
Cassette - depends on the gearing you want.
Chain - KMC. Length you need to measure on the bike.
See 'Read this first' below.

The Rookie

For 2013 Shimano are doing a Deore+ mech so you don't need to shell out for an SLX unless you want to.

swod1

related to the topic, can you run a 10 speed rear cassette, derailleur and use a 9 speed triple chainset up front ?

The Rookie

Yes, as well as a 9 speed mech and shifter.

swod1

The Beginner wrote:

Yes, as well as a 9 speed mech and shifter.

Great, i thought you could but wasn't sure, I have a triple 22/32/44 9 speed chainset.

I'll see what lbs can do for me on cassette, shifter and derailleur in 10speed.

njee20

Hang on, that's misleading - you can't run a 10 speed cassette with a 9 speed mech and shifter (which is how I read that), you can run a 9 speed mech and shifter with a 9 speed chainset though (obviously), and run 10 speed bits with a 9 speed chainset.

swod1

The Beginner wrote:

Yes, as well as a 9 speed mech and shifter.

i take it you mean the front mech and shifter can be 9 speed but need to have 10speed chain, cassette and rear derailleur and shifter.

njee20 wrote:

and run 10 speed bits with a 9 speed chainset.

this is what i was intending to do 10 speed rear derailleur, cassette and chain but keep the 9 speed 3 ring chainset at the front, that will be upgraded to 10speed at a later date.

The Rookie

swod1 wrote:

The Beginner wrote:

Yes, as well as a 9 speed mech and shifter.

i take it you mean the front mech and shifter can be 9 speed but need to have 10speed chain, cassette and rear

Correct.........