The +5mm Steel Portal Drive Stub Axles are designed specifically for the 1/18 Redcat Ascent 18. These stub axles are constructed from hardened #45 steel, ensuring durability and strength during use. By adding 5mm to the track width on each side of the vehicle, these axles are engineered to enhance stability on rough terrains. This wider stance also allows for better steering clearance and opens up a wider selection of tires suitable for the vehicle, making it an essential upgrade for enthusiasts looking to optimize their RC experience.