Mack Full Rear Fender Set – 28" Drop, 9" Sidewall with Light Box
Give your rig a bold, custom edge with the Mack Full Rear Fender Set. Built for 52" or 54" axle spreads (not compatible with 60"), this setup features a 28" drop, aggressive 9" sidewall, and a clean straight edge for serious road presence and protection.
✔ ArmorCore Advantage™ Lifetime Warranty Against Spider Cracks
✔ 28" Drop with 9" Sidewall and Straight Edge
✔ Integrated Molded Light Box (User-Cut Holes)
✔ Double-Lined Fiberglass Construction
✔ Made in the USA – Seymour, Indiana
Each fender includes a molded light box (lights not included), giving you full control to cut your own light holes and create a lighting setup that fits your style. Designed with a hidden bracket system and reinforced with our ArmorCore Advantage™ liner system, backed by a lifetime warranty against star and spider cracking. These double-lined fenders are built to take a beating and still look sharp.
Finished in a smooth, paintable gel coat, ready to customize to match your build.
| Technical Specifications | |
| Height | 28" |
| Material | 1/4" Composite Fiberglass |
| Coating | Marine Grade Gray Gel Coat - Paint Ready |
| Liner | ArmorCore Advantage™ Liner - Lifetime Warranty Against Spider Cracks |
| Bracket System | Double Hump / Full Fender Brackets (Standard), Double Hump / Full Fender Bracket Set (Flip Up) |
Compatible Truck Brands:
- Peterbilt Trucks - Fits Peterbilt 379, 389, 567, and other models with 52"-54" axle spreads
- Kenworth Trucks - Compatible with Kenworth W900, T800, T680, and similar configurations
- Freightliner Trucks - Designed for Freightliner Classic, Coronado, and comparable models
- International Trucks - Fits International 9900i, ProStar, LoneStar, and other heavy-duty models
- Mack Trucks - Compatible with Mack Granite, Pinnacle, and similar chassis configurations
- Volvo Trucks - Designed for Volvo VNL, VNM, and other heavy-duty Volvo models
- Western Star Trucks - Fits Western Star 4900, 5700XE, and comparable configurations
Our hidden bracket system ensures a sleek, professional installation across all compatible truck brands. Choose between standard or hinged brackets for easy access to your truck's components.
Sold as a pair.
Important: These fenders are shipped unpainted and require professional painting. We recommend dry fitting before final installation. Please provide your truck's year, make, and model when ordering to ensure proper fitment.
Have Questions?
Check out our Bad Ass FAQ and get answers before you buy.
Specifications
| Technical Specifications | |
| Material | 1/4" Composite Fiberglass |
| Coating | Marine Grade Gray Gel Coat - Paint Ready |
| Liner | ArmorCore Advantage™ Liner - Lifetime Warranty Against Spider Cracks |
| Bracket System | Double Hump / Full Fender Brackets (Standard), Double Hump / Full Fender Bracket Set (Flip Up) |
You may also like
Shop by collection
View all
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.
















