Ready to toughen up your Losi Lasernut U4 Tenacity rock racer? This GPM aluminum upgrade combo set replaces stock plastic parts with durable CNC-machined aluminum components. Includes front C-hubs, front and rear knuckle arms, and a full steering assembly—all in a bright orange finish. The aluminum construction reduces flex, improves steering precision, and handles crashes better than plastic. Designed specifically for the Losi 1/10 Lasernut U4 Tenacity (model LOS03028). Installation requires basic RC wrench skills and maybe some threadlock. Comes with all necessary screws, nuts, and bearings. Whether you’re bashing, racing, or just want a more robust rig, these upgrades add strength and a cool custom look. Keep your Lasernut running strong over rough terrain and big jumps. A popular set for serious RC enthusiasts who demand performance and durability. Check compatibility with your exact model before ordering.
