(rhymes with spook)
Join Date: Aug 2009
Location: Winslow, AR
Posts: 2,788
Bikes: '83 univega gran turismo x2, '85 schwinn super le tour,'89 miyata triple cross, '91 GT tequesta, '90 yokota grizzly peak, '94 GT backwoods, '95'ish scott tampico, '98 bonty privateer, '93 mongoose crossway 625, '98 parkpre ariel, 2k'ish giant fcr3
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so, the chain never rubbed before you began tinkering and watched the video? usually that would indicate you have a front derailleur that's either set too high on the seat tube or the derailleur is being used beyond it's capacity. but, if it didn't do it before, something else is happening...possibly. are you running a triple ring crankset?