Building a 98 Giant Yukon for my son and can't remember what size front derailleur it takes. yes the frame is aluminum. Anybody have any ideas???...
Giant Rider
31.8mm or 34.8mm
Rocky Rider Oct 14, 2001 7:25 PM
It's either 31.8mm or 34.9mm. Take a caliper and measure the diameter of the seat tube, that's all there is to it. I know older ATX-series used 34.9, don't know about your bike.
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