can anyone explain to me what the spacer rings do between the dual wheels on a massey 135, i have got myself a set of dual wheels but i dont have the spacer rings, i have bought a full set of extension studs and nuts, was told that the spacer ring was only needed if you werent using a full set of extension studs to secure the wheels not sure if any truth in this, has anyone heard of wheels coming off or being damaged when these spacers are not used?