its a bit tricky finding adverts with the info u need aint it?

prolines dirt hawgs for 1/10 buggy rear wheels will fit the rally wheels. they balloon like crazy, but if u fibre tape the inside of the tyre, they are a very good, sticky bashing tyre.

cens rally tyre isnt bad either for allround use, wear rate aint bad, ballooning isnt an issue either.

anyway - 2.2" buggy rear tyres are what u want.