ASTAMOTOR Quarter Fender Mounting Posts for Semi Trucks — 8" Cast Steel Pair, Corrosion-Resistant

ASTAMOTOR quarter fender mounting post brackets are a pair of heavy-duty 8" cast-steel posts that create a reliable single-bolt attachment point for semi truck quarter fenders.

These mounting posts are engineered to replace or upgrade worn quarter fender supports on trailers and semi trucks. Each set includes two tube brackets plus the necessary bolts and washers for a straightforward swap. Built from cast steel with corrosion-resistant properties and sized to industry OE references, the posts are intended to be compatible with a wide range of vocational and highway tractors.

How do these brackets fit my truck?

These are universal single-bolt quarter fender mounting posts designed for common heavy-duty trucks. They match the 1-7/8" outside diameter and the 8" length specification used by many OEMs, and align with several OE part numbers for cross-reference.

• Fits trucks from Freightliner, Peterbilt, Kenworth and similar models
• Outside diameter: 1-7/8"; length: 8"
• Cross-references Betts X2900, Fleet Engineers 032-00199, Meritor 573

What materials and durability can I expect?

The posts are cast from heavy-duty steel to resist bending and stand up to road vibrations and load stresses. A corrosion-resistant finish helps them tolerate moisture and salt exposure, extending service life compared with lighter materials.

• Cast steel construction for high strength
• Corrosion-resistant treatment to reduce rusting
• Bolts and washers included to ensure secure fastening

How simple is installation and what hardware is provided?

Installation is intentionaly straightforward: the single-bolt design lets you replace old posts quickly without modifying the fender or frame. The package contains the tube brackets along with bolts and washers so you can complete the job in minutes with basic hand tools.

• Direct-fit single-bolt mounting—no welding required
• Includes bolts and washers for immediate installation
• Typical install time: a few minutes per side with common tools

Will these match OEM specifications and part numbers?

Yes, these mounting posts are sized and referenced to several common OE part numbers to simplify identification and replacement. Use the listed cross-references to confirm compatibility with your existing hardware before ordering.

• OE cross-references: Betts X2900, Fleet Engineers 032-00199, Meritor 573
• Designed to meet typical quarter fender post dimensions
• Works as replacement for many standard single-bolt mounts

Who is this for: professional mechanics, fleet maintenance teams and owner-operators who need a durable, easy-to-install replacement for worn or damaged quarter fender posts. If you service Freightliner, Peterbilt, Kenworth or similar heavy trucks and require a dependable, industry-compatible mounting solution, this pair of ASTAMOTOR cast-steel posts delivers a practical balance of strength, fitment clarity and quick installation.