Well, well, well... Garmin just announced their new FR 245M... At this point reading the DC Rainmaker review I was thinking...
Will Garmin add some 245M new features to 645M?
Like VO2max being affected by heat; new Race Predictor that use not only age and VO2max, but base mileage; Body Battery or from 945 the Training Load Focus Stats, Respiration Rate and Heat and Altitude Acclimation...
Because in my mind the 645 must have more features than 245 or it doesn's make any sense.... So I hope that Garmin adjust this new features from 245M to the 645M and add some stuffs from 945 so the 645 can be between both models...