Small sprocket rear won't engage

tytherington
tytherington Posts: 219
edited May 2018 in Workshop
I have a trek madone ultegra throughout
When I attempt to engage smallest gear at rear it just sit there for a minute or so then drops in lovely. When i put bike on stand no issue. At all if I stop pedalling before shifting to smallest sprocket shift to smallest sprocket then pedal . Again it drops in no issue.


Please help . Mick

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