How to choose the shock absorber of MN MODEL MN128 RC CAR?

MN MODEL MN128 RC CAR metal material:
Advantages: high strength, good rigidity, strong durability, able to withstand large impact and pressure, and protect the shock absorber from damage.
Disadvantages: relatively heavy, may affect the weight distribution and balance of the vehicle.

MN MODEL MN128 RC CAR plastic or other composite materials:
Advantages: relatively light, low cost, may have certain elasticity and corrosion resistance.
Disadvantages: durability may not be as good as metal materials, and it is easily affected by wear, aging and deformation.