Garmin Forerunner® 255 | Running Smartwatch. FREE GROUND SHIPPING ON ORDERS $25 AND UP. Tidal Blue. PART NUMBER 010-02641-01. Case Size. 41 mm 46 mm.
The Garmin Forerunner 255/255S is now also a multisport triathlon watch! Features include: Multi-band GPS support. Barometric altimeter and compass. Full triathlon/multisport support & activity profiles. Cycling power meters support. Cycling VO2Max. Native running power. Running-power specific training zones.