Hello. I am a newbie to GT Bike and currently is looking for one. The major reason to my interest to the GT avalanche is the low stand over height for my wife. With some online searching, I am extremely confused with the different frame construction to the Avalanche. There are models currently on the GT bike official website with straight top tube while there are photos I can see the Avalanche with curved toptube. Can anyone help me understanding the difference? Can I get less than 25.5inch standover height with the small curved top tube Avalanche?