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Different printers are differently accurate. Especially the rippled vertical surfaces (due to layers) can be very different. There are various options to tune this and potentially avoid sanding.

1) smaller layer height
2) reduce material flow resp slightly underextrude
3) in "Simplify3D" under "process settings / other" use a negative "horizontal size compensation"
4) in your slicer software set the nozzle diameter a bit larger than the real diameter (similar effect as 3)
5) buy a new printer (not really an option) ;-)

I recommend to test-print a cylinder with well known dimensions, while tuning these print settings, and check the printed size with the callipers.