NCAA - DUAL CHAMPIONS!
Join Date: Mar 2000
Location: From Sarasota, FL sitting in front of a computer spewing random thoughts!
Bikes: Intense Uzzi SL, Masi Speciale, Trek 3700 Nashbar Single Speed, Old Cilo Road frame
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Does it shift fine in the rest of the gears?
If so, then you probably have a bent derailleur hanger. Take it back to the shop and have them try to straighten it for you. Tell them specifically it shifts fine in most of the gears but not the upper 3 or 4. That will cause the red flag about the messed up derailleur hanger.
If it's not too bad you can try resetting the cable and the barrel adjusters. Follow the directions at Park Tool.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger