Front Derailleur

R8JimBob88
R8JimBob88 Posts: 285
edited January 2011 in Road beginners
A noob question here folks.

Just thinking about replacing my front derailler. I currently have an 8 speed shimano 2300 double. Would it matter if I replaced it with a 9 speed Sora double? Just want something cheap.

Also, my bike is a specialized Allez and therefore is a clamp on style. Does anyone know what the diameter of the clamp should be? Where can I find out. It's either 28.6mm/31.8 or a 34.9mm that I can order.

Cheers!
If you do what you have always done, you will get what you always got....

Comments

  • nochekmate
    nochekmate Posts: 3,460
    Can't see that changing the front mech from 8 to 9 would be a problem - not the greatest techie in the world though compared to others on this site.

    This link seems to suggest that Allez models are 31.8mm band on mech

    http://www.specialized.com/us/en/bc/SBC ... &gold_ses=
  • R8JimBob88
    R8JimBob88 Posts: 285
    nochekmate wrote:
    Can't see that changing the front mech from 8 to 9 would be a problem - not the greatest techie in the world though compared to others on this site.

    This link seems to suggest that Allez models are 31.8mm band on mech

    http://www.specialized.com/us/en/bc/SBC ... &gold_ses=

    Cheers for that, seems 31.8mm is what I'm looking for.

    I know that the chain diameter is different for 8/9 speed chains so just wondered if it would pose a problem, personally i reckon it would be ok but just wondered if anyone knows something I don't.

    Cheers
    If you do what you have always done, you will get what you always got....
  • jc-bike-person
    jc-bike-person Posts: 69
    I have one for sale on Ebay right now!
    (with a rear derailleur - so you could upgrade both)

    Item number - 290521728277 - just add this into the search box
    ... must train harder
  • nochekmate
    nochekmate Posts: 3,460
    Is the original shimano derailleur knackered? - can't see why just changing the front mech to Sora is worth it at all.
  • R8JimBob88
    R8JimBob88 Posts: 285
    Yep the front one is knackered, the adjustment screws had lost their plastic thread and would unscrew themselves whilst riding. For the price of replacement screws it is just as easy to buy a new one.

    I've just bought new cassette, rear derailleur etc so figured it would make sense. Got a Tiagra one in the end.
    If you do what you have always done, you will get what you always got....
  • Redfred237
    Redfred237 Posts: 42
    If you've bought a new cassette make sure you fit a new chain as well.
    I've made the mistake of just fitting a new cassette before and cursed when trying to set up indexing, went back to LBS for a new chain, Bloke said he wondered how long it would take before I came back for a chain. Now use different LBS with more helpful staff who are willing to give out advice.
  • R8JimBob88
    R8JimBob88 Posts: 285
    Yep new chain waiting to be fitted too. Got some new wheels, brakes and cables too! It's been an expensive month. Everything has given up at once on me :(

    Ah well, it's been well used so it can be justified.
    If you do what you have always done, you will get what you always got....

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