Was suppose to be a 15mins runs... it rain for a short 5mins.. the floor was wet... Couldn't believe it runs better than foam - as these really are wet tires LOL! My friend's XJR-12 foam wheels were drifting and spinning... while I had some grip... as the Sun came out - the tires started to warm up.. .it runs better now --- after warm up! almost like Tamiya stock hard tires... we still couldn't believe it... the surface is high grip! Good for rubber tires and sometimes foam - but when it's dusty or wet foam will loose out.