Medium Side Front Fender Set – Peterbilt 389 (4.5″ Sidewall)
Add a bold custom edge and real-world protection to your Peterbilt 389 with our Medium Side Front Fender Set, built with a 4.5″ sidewall and available in 91″ length or extended 99″ length. Designed for aggressive styling without sacrificing durability, these fenders are built to perform and built to last.
✔ ArmorCore Advantage™ Lifetime Warranty Against Spider Cracks
✔ Ships in 2 Business Days
✔ Precision Fit – Peterbilt 389 (91″ or 99″)
✔ Double-Lined Composite Construction
✔ Made in the USA – Seymour, Indiana
Constructed with double-lined fiberglass for added strength and a built-in mud flap bracket for convenience and structural support. Every BA Custom Truck Parts fender features our ArmorCore Advantage™ liner system, backed by a lifetime warranty against star and spider cracking. You won’t find a tougher composite fender on the market.
Durable, lightweight, and finished in a smooth, paintable gel coat, these fenders are ready to customize to match your build.
Sold as a pair (2 fenders)
Important
Fenders come gel-coated and require painting.
Always dry fit before painting — painted fenders are non-returnable.
Photos may show custom-painted customer builds.
Explore our full Peterbilt Fender Collection for additional sizes and styles.
*Free shipping to lower 48 only.
Have Questions?
Check out our Bad Ass FAQ and get answers before you buy.
Specifications
| Technical Specifications | |
| Material | 1/4" Fiberglass |
| Coating | Marine Grade Gray Gel Coat - Paint Ready |
| Liner | ArmorCore Advantage™ Liner - Lifetime Warranty Against Spider Cracks |
You may also like
Premium Quality
Made in the USA Fiberglass Semi Truck Fenders
Proudly made in the U.S.A. in Seymour, Indiana, Bad Ass Custom Truck Parts hand-builds premium fiberglass semi truck fenders designed for real-world abuse. Our double hump and custom fiberglass fenders are engineered to handle serious miles, heavy loads, and brutal road conditions.
Every semi truck fender we build is made in the USA and backed by a lifetime warranty—so you get parts that don't just look tough, they perform. When you run Bad Ass fiberglass fenders, your truck is ready for whatever the road throws at it.