essentially rubber -g. No. the manufacturer did not take care of the normal strength of the cord. there is nothing outstanding in this rubber - in the sand, in order to drive effortlessly, you have to "deflate". I tried it on the sand with a trailer - until I lowered it to 1 atmosphere - I dug in with a bang. On the track because of the weak cord after 120 starts to "jump". Holds up well dry. Snow - more or less. Unless wear-resistant - yes. On the whole, it is balanced well - 10-20 grams per side and 20-30 on the other - the average per tire. but otherwise there are no pluses . at all. I don’t advise on a heavy car - if you are looking for an AT-ku, look at it from normal manufacturers. before that there were coopers - their only drawback was the noise after 100-110 . in everything else they were better. if you take it on a light car, then they will probably serve.