Rear deraillier

[cyberknight]

The rear mech on my carrera is dieing, the rivets hodling it together are loose enough to allow excessive play in the jockey wheel cage which means the mech is not indexing properly .
Its an 8 speed shimano compatible mech but i have read any speed will do ?

 

[Cyclist33]

I've got an 8 speed shimano alivio, never been used, 15 quid plus postage..?

Stu

 

[Gary E]

Most rear deraileurs daraliours drailiors mechs will say what speed cassettes they're compatible with. I use this one on an 8 speed but as you can see it'll work on 9 or 10 speed also. The indexing (space between gear settings at the rear cassette are determine by the shifters not the derailleur).
The only issue I could see is if the rear cage is specifically for a 10 speed chain it might not run too well with an 8 speed one (it's wider).
This is the only one I've tried so hopefully someone can confirm for specific models.

 

[mcshroom]

9sp is happy with 8sp. I have a 9sp sora mech on my road bike with an 8sp drivetrain

 

[cyberknight]

I've got an 8 speed shimano alivio, never been used, 15 quid plus postage..?

Stu

Sorry i took so long to get back, been chaos atm.Cheers but a bit rich for me , off to ebay .

 

[Cyclist33]

Sorry i took so long to get back, been chaos atm.Cheers but a bit rich for me , off to ebay .

How much did you intend to spend?

 

[Gary E]

Just one last thing - make sure you get a derailleur with the correct cage length (most come in different lengths depending on the cogs you're using front and back). Generally speaking the greater the difference between your smallest gear (Small cog front and small cog back) and your biggest gear (large cog front and large cog back) the longer the cage needs to be in order to keep tension on the chain throughout the full range. If you've got three cogs on the front you'll generally need a bigger cage than a double.

 

[cyberknight]

How much did you intend to spend?

I have already sourced one cheers, its been a bad year for me what with banked hours at work,another kid ,reduced child tax credits etc .
Been selling whatevers not needed so we have cash by the end of the month, wife is so stressed she just walked out the door this evening and i am hoping she comes back ( bet she`s at her parents) before i should go to work tomorrow.

 

[Cyclist33]

I have already sourced one cheers, its been a bad year for me what with banked hours at work,another kid ,reduced child tax credits etc .
Been selling whatevers not needed so we have cash by the end of the month, wife is so stressed she just walked out the door this evening and i am hoping she comes back ( bet she`s at her parents) before i should go to work tomorrow.

I can relate to all this, although in my case she never came back.

 

[cyberknight]

I can relate to all this, although in my case she never came back.

I hope she does we have a 9 month old and a 5 year old.

 

[Cyclist33]

I hope she does we have a 9 month old and a 5 year old.

Lol didn't make a difference in my case.