The Hobie Heavy Duty Plug-in Kayak Cart is great for all Hobie kayaks and features flat free foam filled tires. This cart is suitable for use over compacted dirt and hard surfaces. These tires are foam filled and standard rubber tire with a deep tread pattern. Use it to take your kayak out of your car, guide it to the launch site, or just carry it around your backyard! Cart can be inserted upside down in your Hobie kayak, so you can bring it with you on the water.