Looking at Soltera 7 for my 120 pound daughter for some climbs in Colorado. One climb we do is 7 miles, 1300 feet. Trying to get some idea of how much of the battery she'd use in mid and high assist. Any climbing experiences/data would be helpful! Also, coming from a road bike, surprised that largest cog is only 28 teeth, with 48t in front. That works well enough on steep climbs with the boost? Thanks!