Widowmaker X Rear Full Fender Set – 38" Drop, 5" Sidewall
Make a bold statement on your rig with the Widowmaker X Rear Full Fender Set. Built specifically for semi trucks and custom big rigs, these premium rear fenders combine aggressive styling with heavy-duty craftsmanship for drivers who want their truck to stand out on the road and at the show.
✔ ArmorCore Advantage™ Lifetime Warranty Against Spider Cracks
✔ 38" Drop with 5" Sidewall
✔ Available in Returned Edge or Straight Edge
✔ Double-Lined Fiberglass Construction
✔ Made in the USA – Seymour, Indiana
Featuring a 38" drop and a deep 5" sidewall, the Widowmaker X delivers full rear wheel coverage with a slammed, custom look that transforms the profile of any semi truck setup. Reinforced with our ArmorCore Advantage™ liner system, backed by a lifetime warranty against star and spider cracking.
Designed for durability and high-impact visual appeal, these fenders are perfect for custom haulers, show trucks, and working rigs that demand both style and strength.
Finished in a smooth, paintable gel coat, ready to customize to match your build.
| Technical Specifications | |
| Single Fender Weight | 90 lbs |
| Fender Set Weight | 180 lbs |
| Height | 38" |
| Material | 1/4" Fiberglass |
| Coating | Marine Grade Gray Gel Coat - Paint Ready |
| Liner | ArmorCore Advantage™ Liner - Lifetime Warranty Against Spider Cracks |
| Bracket System | Double Hump / Full Fender Bracket Set (Flip Up), Double Hump / Full Fender Brackets (Standard) |
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 | |
| Single Fender Weight | 90 lbs |
| Fender Set Weight | 180 lbs |
| Material | 1/4" Fiberglass |
| Coating | Marine Grade Gray Gel Coat - Paint Ready |
| Liner | ArmorCore Advantage™ Liner - Lifetime Warranty Against Spider Cracks |
| Bracket System | Double Hump / Full Fender Bracket Set (Flip Up), Double Hump / Full Fender Brackets (Standard) |
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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.






















