Saturday at Eldora I watched for what LR tires were doing. I had previous been told Hooser LR's were non growth tires and the RR's were not. Being the LR didn't grow, when a track slicks up it should be next to impossible to take stagger out as needed, for slick track conditions. What I observed was a dramatic difference between cars in LR tire growth. The troubling thing was all the fast cars seemed to also be the ones which got tire growth out of the LR, almost to the point of it matching up with the RR. After watching I began to think how tire size matched up at entry to turn 1 and beyond was possible a matter of how the turn was taken. But I didn't expect to see such a dramatic difference in LR tire diameter's. I know occasionally they do test tires and I suspect they did not at that race. Because of what I observed, I came here to ask how you could cause a non growth tire to grow so much. Because tire tech is so infrequent I suspect many would prep. But there isn't anyone who would want to get caught chemically treating tires. I already know it's generally accepted that Simple Green ain't going to get you thrown out of anywhere. I'm wondering if side walls could be mechanically weakened or if side walls etc., maybe could be injected with prep instead of a surface application. I already figure there using the widest rim allowed on the RR and the narrowest on the LR to try to even up tire growth. How could you cause growth? I'm thinking there ain't no way early on in time trials, even with drivers running it into the corner differently, I'm going to see both rear tires look pretty much identical in size. Another thought I had about it was maybe what I'm seeing is most all the weight off the LR and on the RR. It would make the LR able to grow easily, while the RR because of weight can only grow after it comes off the ground. But I don't think that's it because I really didn't see the RR tires appear to be compressed on the bottom. There's a good possibility that it is I just couldn't see the compression. The interesting thing if it is I could not see the compression is with that the fast cars to be that way, the drivers had to also be on the throttle differently. That's a real possibility.
anyway, thanks for the responses and I hope there are more. Yes this is a karting site and I asked because of what I observed on cars, but kart tires do grow too just like cars. If you don't believe it make it a point to watch left rears from your local track infield and you'll be supprised how you can see both the left end of the axle unloading and tire growth. If you then put some stuff together, I think you'll also notice those who unload the left end of the axle the most, are not necessarly the fastest on the track. They can be, but they are not necessarly the fastest.
all stuff needs to work the same to be fast, but all stuff does not have the same ability to work as needed
