Although there are several different snowshoe frames to choose from, the basic rule is this : For packed snow - any model will work. For deep snow - the more you weigh, the larger the frame you need. All frames are interchangeable and can be switched in a matter of seconds! NOTE: There is no "wrong" choice. Just as choosing a running shoe with CUSHIONING vs. SUPPORT, the farther or faster you go, the more noticeable the difference. There are 3 categories (Snowshoe Racing, Recreational/Fitness, and Back-Country Hiking) of frames listed below. Find the category that best describes your activity. See the Frame Selection Chart NOTE:, The chart is just a guide. It's purpose is to show that both "user weight" AND "snow conditions" affect the selection. It's not that one choice will work and one won't. It means that one will be slightly better than the other. Also, If you are heavy, the durability may be affected. However, we've never had a problem of frames breaking due to a heavy person on a too small of snowshoe. They are made to be used! Still not sure? call or e-mail! For Snowshoe Racing, it's best to get the smallest size allowed. This is usually 120" F.S.A (120" functional surface area). Some races still require 8"x25" frames. Our Model 121 (121" F.S.A.) is not only the smallest and narrowest on the market, but, because of the design, has the most flotation. Weight is also a key factor. Unlike other brands, we don't sacrifice durability or function to save weight. (Also, our Teflon coated cleats prevent ice and snow build-up which is a huge factor in reducing weight.) Model 121 is the smallest and narrowest snowshoe allowed by the USSSA. Great for Sprints, 5k and short distances but also able to handle the long stuff. For Fitness or Recreational Snowshoeing you typically need a snowshoe that can handle the deeper powder and abuse associated with ungroomed trails and rugged terrain. For this purpose we offer two models. - Our Model 133 has the same interchangeable design as our Model 130 racer, but has larger tubing for additional durability. - Our Model 168 provides additional surface area due to its larger frame. The additional surface area of this model's frame provides more "float" while running or hiking on ungroomed trails in deep powder. Model 133B and Model 168B are Basic versions of the Model 133 and Model 168 featuring standard grade Aluminum (because of the large diameter it is plenty strong) without the Powdercoating (it is shiny) and no Teflon on the heel cleat. For Back-Country Hiking, an even larger, more durable snowshoe would be your best choice. - Our Model 220 is the largest frame that we sell and provides plenty of “float” and a dual heel cleat. You would choose this system if you planned on hiking in the back-country with its rugged terrain and deep powder. Click below for more information or to order: Model 121 Racing Frame Model 133 Rec/Fitness Frame Model 133B Basic Frame Model 168 Rec/Fitness Frame Model 168B Basic Frame Model 220 Back Country Hiker Frame