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  1. #1
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    Need opinion on new derailleur

    Currently I have a Shimano Alivio on a 8 speed trek 4300. What do you think of my selections/upgrade options:
    http://www.jensonusa.com/store/produ...erailleur.aspx

    http://www.jensonusa.com/store/produ...erailleur.aspx

    http://www.jensonusa.com/store/produ...erailleur.aspx

  2. #2
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    From a technical point of view, any one of the those rear derailleurs will work. I would recommend that you get the SGS long cage version for maximum chain slack take up capability as you have not stated the tooth numbers for the chainrings and cassette in order to calculate the minimum capacity required from the derailleur.

    The choice of Rapid-Rise (ie, Low Normal - derailleur starts off at biggest cassette sprocket and travels downwards towards the smallest for each push of the thumb lever) or non Rapid-Rise (ie High Normal - derailleur starts off at smallest cassette sprocket and travels upwards towards the biggest for each push of the thumb lever) is a matter of personal preference.

    For the easiest transition, stick with the non Rapid-Rise version as you won't have to relearn how to use your gear shift changes. Btw, it is also slightly easier to set up too because the chain will not be in much tension when the derailleur starts off on the smallest cassette sprocket and smallest chainring.

    Having said all that, I would choose the Shimano Deore LX RD-M580 on its favourable low price alone.

    The Alivio shifter/Deore LX rear derailleur hierachy combination does not justify any higher price, imho.

  3. #3
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    Straight from website:

    Crank Suntour XCC-150 42/34/24
    Cassette SRAM 5.0 11-32, 8spd
    And for shifters
    http://www.jensonusa.com/store/produ...ft+Levers.aspx

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