This joint cup set features newly-designed parts to replace the kit-standard parts. They are made from a heat-treated alloy which features greater resistance to wear and tear. They are attached by pin and axle ring, which leads to smoother rotation and less tendency for the joint to come apart.

• Reinforced Bevel Pinion Gear x1
• Reinforced Joint Cup x2
• F-350 Ring Gear x1
• Differential Shaft x1
• Compatible with 4x2 R/C tractor truck models.