Shimano 11 speed ?

[Andy.M]

Hi guys, I've decided to change my Focus Jam2 transmission after having a few little problems and want to start from new.
I've identified the cassette as a Shimano SLX csm7000.
The rear derailleur is an Deore XT800 11 speed but I'm not sure if its a GS or SGS (i'm leaning toward SGS)
The chain ring I cannot ID.
Can anyone shed some light on this for me please?

 

[steve_sordy]

The Shimano Technical Documents will enable you to identify just about any component. Take your time to navigate through this, it might look a bit daunting at first.

si.shimano.com

si.shimano.com

 

[Beaker2135]

I can’t say 100% but AFAIK SGS is the long cage version ie for the bigger range on MTB cassettes and GS is the short cage version ie road bike cassettes

Hopefully someone with real knowledge will be along shortly

 

[Andy.M]

The Shimano Technical Documents will enable you to identify just about any component. Take your time to navigate through this, it might look a bit daunting at first.

si.shimano.com

si.shimano.com

Thanks Steve I'll take a look

 

[Andy.M]

I can’t say 100% but AFAIK SGS is the long cage version ie for the bigger range on MTB cassettes and GS is the short cage version ie road bike cassettes

Hopefully someone with real knowledge will be along shortly

That does make sense as looking at the pics on bike parts.co.uk the sgs looks like the one.

 

[Andy.M]

Think I've narrowed the chainring down to SM-CRE80 or SM-CRE80-B
The first says chain line 50mm and the second says for chain line 55mm, what does that mean?

 

[Andy.M]

Sorted it, the part number is stamped on the back of the chain ring!!

 

[steve_sordy]

Think I've narrowed the chainring down to SM-CRE80 or SM-CRE80-B
The first says chain line 50mm and the second says for chain line 55mm, what does that mean?

One ring will have a 5mm offset to allow for the bigger chain line, or maybe the smaller chain line! I'm never sure!

 

[Andy.M]

One ring will have a 5mm offset to allow for the bigger chain line, or maybe the smaller chain line! I'm never sure!

I don't think anyone knows
Luckily for me it was on the back of the chain ring and that begs another question, why not on the front where it's marked 34T ???

 

[Andy.M]

Well parts were ordered and arrived and fitted and bike is back to being awesome again