They are the BFG Mud terrain KM2's described earlier in this thread!
http://www.aulro.com/afvb/d3-d4-rrs/...ml#post1411880
Awesome off road and not overly noisy on the black top - there is noticeable background rumble, but the D3 NVH and suspension soaks up most of the agro normally associated with mud tyres.
Ian

