Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 21 Post(s)
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When you only have 2 chainrings and a front derailleur made for three, you use the outer and middle positions, and use the inner (Low) limit screw to keep the derailleur from moving to the non-existent granny. Doubles are easier to set up than triples because there's no middle position to trim for, the limit screws can be used to trim the inner and outermost positions.
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