Adding spacers to your tractor is one of the best improvements one can make. A roll over with the tractor can happen very fast, especially on uneven ground or with a top-heavy load. The spacers greatly improve the machine stance giving you a more stable platform all around. Spacers also make running chains much easier for a wonderfully sure-footed machine. Bro-Tek wheel spacers have a proven design mated with high quality materials and craftsmanship. Our spacers are made from 6061-T6 Billet Aluminum with grade 10.9 stud/nuts. They are all one-piece, milled spacers with a hub flange that carries the weight of the tractor. This design feature is critical to distribute the load on all BX series and many other machines. Beware designs that only rely on bolts (often lower grade than 10.9) and do not utilize the outer flange (Note: some OEM designs do not have any flange and as such rely on the bolts alone making it very important to use the included high-quality bolts. 3-inch spacers are the most stable option giving the widest wheelbase. Everything is included in the kit and installation is easy. Unlike other products, the Bro-Tek wheel spacer studs remain on the spacer just like the factory hub, making changing wheels very easy for future maintenance. Will work with MMM deck if applicable.