Dually Wheel Spacers - Bolt on the extra space you need
Off Road Unlimited (ORU) has designed a dually spacer that surpasses all the others. These spacers are more like adapters rather than spacers. You actually bolt these to the inner wheel and bolt the outer wheel to the spacer/adapter. This makes it much stronger and safer, spacers have a tendency of cracking and falling out, when the ORU style will never fail.