Assistance needed choosing new derailleur

sunnytour

Hi guys,

I have a 2002 Scott Voltage MX5, a basic bike with basic Shimano Tourney eqiupment. Now, I would like to upgrade rear derailleur with the one from Alivio or Deore group set. I was wondering if any 7-gear derailleur would fit to my bike and are there any other parts that would have to be replaced, such as rear shifter.

I would appreciate any help,
Cheers

cooldad

Any Shimano 7,8 or 9 speed will work with your shifter.

sunnytour

Ok thanks, that sounds good.

sunnytour

I can get as good as new Shimano Alivio M410 (originally goes with rapid fire shifter) and my shifter is Tourney SL-RS40 (twist grip). Do you think they are compatible?

cooldad

Yep.

sunnytour

Excellent! I have a project then.
Thanks a lot

sunnytour

Me again

I thought I could reuse this topic for a quick question. Could someone tell me what is this object marked in red? What it does, what it's called etc? I have never seer something similar on other derailleurs.


Thanks

cooldad

A black bit?

Very common.

sunnytour

cooldad wrote:

A black bit?

Very common.

Yeah, black rubbery bit.
This is Shimano XT, RD-M771 SGS but this is one of the few pictures that show that bit. It even covers Shimano writing

cooldad

It's just a rubbery cover that stops it clacking on the chain stay. In theory. Although I can't actually see much in the picture.

sunnytour

cooldad wrote:

It's just a rubbery cover that stops it clacking on the chain stay. In theory. Although I can't actually see much in the picture.

I guess you're right, I can't see any other use. Here is the same picture enhanced

BigAl

As Cooldad says, just a rubber cover to dull down any noise from banging against the chain stay. If you wish you can just undo, remove and store it in a drawer with other useless things

sunnytour

Well, that settles it. Nothing else to say.
Thanks guys.