RE: Old Foam Tires
just in time lol i was just about to post on how to improve foam tires. get a piece of sandpaper and sand the tire REALLY lightly in all directions until it gets a little more grippy. try to keep it level all around though. afterwards brush off excess and cut a strip of tape. wrap the tape around the tire lightly and slowly peel it off to get rid of all dirt etc. do this for each tire, it works for me and improves the friction on my tires by at least 30%
hope this helps