Another track wheel thread... is 7" enough?

[gecko2k]

I am considering as well to buy some semis in the next few weeks. I never had 'brand new' ones. mostly only cheaper second hand ones. How long can you expect a semi slick to last? Same as a normal street tyre?

[Coralon]

No they will last much less, a few thousands km's at best and much less if you are driving them hard. But a few thousand km around a circuit is a lot of laps so you will get quite a few trips out of them. The interesting thing I am having trouble finding good information on is related to heat cycling, the effect it has etc and also shaving to reduce heat build up and tread squirm. I am sure others here will have more info relating to these important issues