If you had the pleasure of inspecting a genuine (pre sellout) Yeti hardtail frame in detail you will probably instantly see a lot of connections to the BMX world. The rear end is a looptail, just like quite a lot of vintage BMX frames where made, the early Yeti frames did not use 1" headset but BMX size, just like the bottom bracket on early Yeti frames. You can also see shades of BMX in the ovalization of tubes and in the Accu Trax fork. So to find out a 24" wheeled Yeti might not come as a big surprise. It was probably made for some racing application such as dual slalom. I am quite curious how it rides.