These are the tyres:
http://www.rcdisco.com/part-info.php?partNo=DB10022A
http://www.rcdisco.com/part-info.php?partNo=DB10024A
http://www.rcdisco.com/part-info.php?partNo=DB1002RA
There not a new compound, they were released last year and i used them in 4wd at the previous Chadderton series.
I had a 3mm washer under the inner ball stud and was on the next to last outer hole on the hub.
Ill post my set up sheet on the website this week.