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  1. #1
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    lower gearing using mtb crank

    I got a 520 about a little over a year ago and want to replace the standard 50/39/30 tiagra crankset. I've looked at the shimano lx and other cranksets that have 44/32/22, but I want a inner chainring of 20. Are there any cranksets out there or can I buy a 64mm 20 tooth chainring and switch out the 22 tooth?

  2. #2
    ed
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    Climbing something completely vertical?

    Ebay:

    Titanium small chainrings available in 20T, 21T, 22T, and 24T sizes, please specify size at checkout time. Stock photo.

    Titanium chainrings are lighter and more durable than steel and last an average of 5 times longer than alloy rings. Their ability to hold their shape will improve shifting and help your chain last longer. They are less expensive than alloy rings in the long run.

    Action Tec's chainrings are CNC laser cut from .115" thick 8/11 titanium alloy, then CNC machined to .071" thick at the teeth, spot faced and hand finished.

  3. #3
    ed
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    You could also get a new cassette with a 36t inner. Can you imagaine a 20/36 combo? Holy Crap!

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