i think theres only one type of tiagra front mech? mine only has a compact but the shifters/mech can be used on a triple so gotta be carefull not to shift past big chainring
It can but it will not be quite as good as a double one due to slightly different geometry. You should have no problem with overshifting as the travel is controlled by the stop screws not the shifter.
There are 4 Tiagra front mechs. Double and triple in both clamp on or braze on fittings.
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There are 4 Tiagra front mechs. Double and triple in both clamp on or braze on fittings.