Swapping Chainrings

SCR Pedro
SCR Pedro Posts: 912
edited May 2009 in Workshop
Hey there,

Am I right in thinking that if I change my 53T ring to a 50T ring, I won't have to make any adjustments to the front derailleur?


Cheers
PEdro
Giant TCR Advanced II - Reviewed on my homepage
Giant TCR Alliance Zero
BMC teammachineSLR03
The Departed
Giant SCR2
Canyon Roadlite
Specialized Allez
Some other junk...

Comments

  • redddraggon
    redddraggon Posts: 10,862
    You'll probably have to lower the front mech a bit
    I like bikes...

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  • guilliano
    guilliano Posts: 5,495
    That will also mean adjusting the cable as lowering will change the length needed to reach the mech
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  • SCR Pedro
    SCR Pedro Posts: 912
    Ok, thanks.

    Pedro
    Giant TCR Advanced II - Reviewed on my homepage
    Giant TCR Alliance Zero
    BMC teammachineSLR03
    The Departed
    Giant SCR2
    Canyon Roadlite
    Specialized Allez
    Some other junk...
  • Pokerface
    Pokerface Posts: 7,960
    Also make sure that the BCD is the same on both sets of chainrings! (Traditionally one uses a 110 bolt diameter - the other a 130). Some chainring manufacturers will make the rings in 50 and 53 in both sizes for an easy swap, but 'name brand' manufacturers don't (like Shimano, Sram, etc).
  • SCR Pedro
    SCR Pedro Posts: 912
    Yes, the chainrings are identical. One is SRAM Rival, and the other a Truvativ, but the only difference is those 3 teeth.

    It's quite surprising really, that a £550 bike has the same chainrings as a >£1k bike. Maybe it keeps costs at SRAM down.

    Cheers
    Pedro
    Giant TCR Advanced II - Reviewed on my homepage
    Giant TCR Alliance Zero
    BMC teammachineSLR03
    The Departed
    Giant SCR2
    Canyon Roadlite
    Specialized Allez
    Some other junk...

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