Join Date: Sep 2004
Location: Irving Heritage District
Bikes: 7-Eleven Eddy Merckx, Vitus Futural, Catamount FRS, Colnago SL, SS MTB
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If I don't ride my 8-speed Ultegra STI bike frequently, I have to spray WD-40 in the shifters to de-gunk them so that they'll work. I haven't tried compressed air, so I don't know if it'll work. When I spray them, I just squeeze the lever as if I'm braking, then spray the internals with WD-40. Let it sit a few minutes, then try shifting. You may have to spray them a couple of times to get them to work.