If you frequently drive on muddy or rocky roads, soft-rubber fenders require additional reinforcement. In such conditions, fenders are subject to increased impact from rocks and water, making them more susceptible to loosening and peeling. Here are some ways to improve the stone resistance of soft-rubber fenders:
Choose the right material and thickness: Prefer thicker fenders made of high-density, flexible soft-rubber material. For example, some mountain bike-style thickened fenders are more than twice as thick as regular fenders, providing better resistance to stone impact.
Optimize installation: Use both screws and clips to secure the fender. Avoid using glue alone, as glue provides less stability. During installation, ensure the fender fits snugly against the vehicle body, tighten the screws, and lock the clips into place.
Add reinforcement: Metal strips or iron plates can be added to the edges or key areas of the fender for reinforcement. For example, metal washers or reinforcement brackets can be used at the junction of the fender and the vehicle body to enhance the overall strength of the fender. Regular Inspection and Maintenance: Regularly inspect the fenders for loose screws and loose clips. Tighten or replace any problems promptly. Also, clean any accumulated mud, sand, and stones from the fenders to prevent them from causing long-term damage and abrasion.

Install protective strips: Install protective strips on the outer edges of the fenders. These strips can be made of rubber or silicone. When stones strike, they act as a buffer, reducing the direct impact on the fender.

Integrate other protective measures: Consider applying invisible film to key areas of the vehicle. This film is highly durable and can further protect the paint from stone impacts. Additionally, maintaining a reasonable speed and avoiding driving near large trucks can help reduce stone impacts on the fenders and vehicle body.