Specificaions Material: Brass Processing: CNC machined Surface Treatment: Electrophoretic Coating Color: Black Length: 117mm / 4.61 in Weight of Front Axle: 85.5g / 3.02 oz Weight of Front Axle: 64.5g / 2.28 oz Weight of Wheel Hubs: 24.2g / 0.85oz(4Pcs) Total Weight: 174.2g / 6.14 oz Diameter of Wheel Hubs: 20mm Thickness of Wheel Hubs: 2.5mm Minimum Ground Clearance: 26mm Approach Angle: 70 Passing Angle: 70 Longitudinal Passing Angle: 33 Warm Tips 1. A small amount of lubricant has been added to the gears at the factory, but the amount of grease is not large enough for ease of transportation. It is recommended that both the differential gears and the main gears be lubricated before use. 2. The Portal axle is mainly for crawling and off-road performance, although we use high-strength steel in the drive axle, the axle may also be broken when the super-rapid steering, please do not treat it as a racing car! 3. Because the drive shaft of the mini RC cars like SCX24 are usually slender, prolonged high speeds and intense crawling may lead to shaft fractures. This is a normal phenomenon we hope to be understood, and it is advisable to be prepared with a few spare shafts.