Has anyone won at Topeka without a co-driver. Without regard to advice or help is a co-driver necessary? I have never been on concrete so i am not sure how critical tire temp is. thanks for the responses.

 

In previous years I'd say yes, absolutely - the A3S03 was pretty much useless on the first run; and didn't do very well if the temp dropped too far.

Now that we have the A3SO4 I'd so no, not required. The 04 seems to hold the heat better - and starts to fade if they get tooo hot.

-Sean

 

Yeah... what he said.

The new tires (both Kumho and Hoosier) seem to perform much better at lower temperatures than their predecessors.

Andy H.