Those are the tires included with the F104 NOT PRO and they work great on temperate/hot tracks. I use on summer and they gives a nice grip and smooth slice on corners. They also have a great amount of rubber so they last for long time, more than 10 batteries. I have buyed some for those warm days and don't change to sponge ones, I love car's behavior with these.
I bought this one... and I bought it again! Who else I bought it from? rcMart of course. These tires is really great. Thats why I bought another set as a spare. This is for my rear tires on my F104 Pro
Great additional item for F104 pro when use on outdoor track. Give you grip you need. I bought this along with Tamiya (#51399) F104 Rubber Tires (Front tire) and Tamiya (#54201) F104 Plated Mesh Wheel (For Rubber Tires). All from rcMart!!