Yes been looking in the forums some say get rid of the 19's and 20's and get a set of 18's for best performance on D3/4/RRS in the sand. Then the D2 people say get rid of the 18's and get 16's.
It looks like the 265/60R18's are my best option as there are a lot of them around as rar110 said. Also the 265/65R18's are worth looking at too.

