Losi 1/4 scale Promoto MX motorcycle owners - these red aluminum reinforcement rings are exactly what you need to protect your investment! If you're doing serious riding with jumps and hard landings, the stock plastic wheels can sometimes need extra support. These CNC-machined aluminum rings bolt right onto your existing LOS46003 wheels, adding serious durability without adding much weight. The red anodized finish looks awesome against the black wheels and gives your bike some custom style. Installation is straightforward - just remove your wheel, align the ring, and bolt it into place. They're specifically designed for the 1/4 scale Promoto MX, so the fit is perfect with no modifications needed. Whether you're bashing around the backyard or hitting the track, these rings help prevent wheel damage from hard impacts and extend the life of your expensive RC motorcycle. Plus, they just look cool - that red pop against the black wheel really makes your bike stand out. Definitely a smart upgrade if you're pushing your Promoto to its limits!