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No. It'll need a 30.6mm seat post or require shimming to 27.2. Reaming it out to fit a 30.9mm seatpost will leave the walls to thin and cause a stress riser at the end of the reamed section.
Brommers
Tijmen
Am I correct in thinking this seattube (SLFM13635) can be reamed to 30.9mm?