Join Date: Nov 2004
Bikes: Look kg481SL, Look kg361, Bianchi Eros, Vintage (gorgeous) Motobecane Grand Jubilee
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It ALL depends on the seat tube diameter. You do not need a 115.5 to run a triple. I run one with a 111. From Campy: 111mm is for use with double and triple cranks with seat tubes smaller than 34.9mm. For 34.9/35.0mm seat tubes, use the 115.5 Centaur, #0207
Plus with the 111, you get a slighty better chain line from the small or middle chain ring to the lowest gear in back.