Low Rider ST FXLRST Headlight Trim Ring: Ultimate Guide to Selection, Installation, and Long-Term Care​

2025-11-20

If you own or ride a Harley-Davidson Low Rider ST FXLRST, you already know this cruiser blends classic styling with modern performance. One often-overlooked but critical detail that elevates its presence is the headlight trim ring—the circular accent surrounding the headlight assembly. This small component does more than just frame the light; it ties together your bike’s front-end aesthetics, protects the headlight housing from debris, and can even improve light output by reducing glare. Whether you’re restoring a vintage look, upgrading to a custom style, or simply maintaining your bike’s factory freshness, understanding how to choose, install, and care for your FXLRST headlight trim ring is essential. In this guide, we’ll break down everything you need to know to make informed decisions, avoid common pitfalls, and keep your trim ring looking and functioning like new for years.

What Is the Low Rider ST FXLRST Headlight Trim Ring, and Why Does It Matter?

The headlight trim ring on the FXLRST is a circular trim piece, typically made of plastic or composite, that sits flush against the motorcycle’s front fairing or headlight nacelle. Its primary roles are:

  • ​Aesthetic Cohesion: It aligns with the bike’s design language, smoothing transitions between the headlight, fender, and upper fairing. A mismatched or worn ring can make the front end look disjointed.

  • ​Protection: It shields the headlight housing from stones, bugs, road grime, and UV damage—elements that can fade paint, crack plastic, or cloud the lens over time.

  • ​Functional Support: Some rings include tabs or channels that help secure the headlight assembly in place, ensuring proper alignment for optimal light beam projection.

For FXLRST owners, this trim ring is especially visible due to the model’s low-slung, stretched front end. A clean, well-maintained ring enhances the bike’s “stance,” making it stand out in a crowd or during group rides. Conversely, a cracked, faded, or loose ring can detract from an otherwise pristine build.

How to Choose the Right Low Rider ST FXLRST Headlight Trim Ring

Not all trim rings are created equal. Selecting the right one depends on your goals—whether you want OEM factory precision, a custom look, or a durable upgrade. Here’s what to consider:

1. ​Material: Plastic vs. Metal vs. Composite​

Most factory FXLRST trim rings are made of ABS plastic or a similar durable polymer. These are lightweight, cost-effective, and designed to withstand normal riding conditions. However, they can scratch, fade, or become brittle in prolonged sunlight.

  • ​OEM Plastic Rings: Ideal for restorations or riders prioritizing originality. They match the bike’s factory color and texture perfectly. Look for part numbers specific to the FXLRST (e.g., Harley-Davidson part # 33147-19, though verify with your model year).

  • ​Metal Rings: Often aluminum or billet steel, these offer a more aggressive, custom look. They’re resistant to scratches and UV damage but heavier. Ensure they’re designed to fit the FXLRST’s headlight housing—some metal rings require drilling or modifying the fairing, which isn’t recommended for beginners.

  • ​Composite/Reinforced Plastic: Upgraded versions with UV stabilizers or fiberglass reinforcement resist fading and cracking better than basic OEM rings. Brands like Santee or Drag Specialties offer these as aftermarket alternatives.

2. ​Color and Finish​

The FXLRST’s color palette (Black Denim, Vivid Black, Olive Gold, etc.) influences trim ring selection. Factory rings are usually painted to match the body, but aftermarket options may offer:

  • ​Painted Finishes: Match your bike’s exact hue using OEM color codes (available from Harley-Davidson or third-party sellers).

  • ​Polished/Clear-Coated: For a chrome-like or raw look—popular with custom builds.

  • ​Matte or Brushed Finishes: Adds subtle texture, pairing well with matte black or two-tone paint schemes.

Pro Tip: Use a color swatch or take a photo of your bike to a parts store to ensure the ring’s finish complements your FXLRST’s scheme.

3. ​Compatibility and Fitment​

The FXLRST has a unique headlight housing design compared to other Low Rider models. Always verify the trim ring’s compatibility with your specific year (2021+ FXLRST) and headlight type (stock or aftermarket). Check product descriptions for:

  • “Fits Harley-Davidson Low Rider ST FXLRST”

  • Dimensions (diameter, thickness) matching your headlight nacelle.

  • Screw hole spacing (common sizes are M5 or #8-32 threads).

Avoid generic “universal” rings—they rarely fit perfectly and may require modifications that compromise the bike’s integrity.

4. ​Brand Reputation and Reviews​

Stick to trusted brands for quality and fit:

  • ​Harley-Davidson Genuine Parts: Best for factory accuracy but pricier.

  • ​Drag Specialties: Offers durable aftermarket rings with precise fitment.

  • ​Santee Leather & Metal Works: Known for custom finishes and robust construction.

  • ​RevZilla or Cycle Gear: Retailers with detailed customer reviews—check for mentions of fit, finish, and ease of installation.

Step-by-Step Installation: Replacing or Upgrading Your FXLRST Headlight Trim Ring

Installing a new trim ring is a manageable DIY project with basic tools. Follow these steps to avoid mistakes:

​Tools Needed:

  • Phillips-head screwdriver (small, #1 or #2)

  • Torx bit set (if your ring uses Torx screws—common on newer models)

  • Rubber mallet (optional, for gentle tapping)

  • Microfiber cloth (to clean the area)

  • Contact cement or adhesive (if the ring has a snap-on design that requires extra securing)

​Step 1: Prepare the Bike​

  • Park your FXLRST on a level surface and allow the engine to cool.

  • Remove the front wheel (optional but makes access easier—consult your service manual for instructions).

  • Disconnect the battery’s negative terminal to prevent electrical shorts if working near wiring.

​Step 2: Remove the Old Trim Ring​

  • Inspect the old ring for screws or clips. Most FXLRST rings use 4-6 small screws around the perimeter.

  • Use the appropriate screwdriver or Torx bit to loosen and remove each screw. Keep them organized—they’re easy to lose.

  • Gently pry the ring away from the headlight housing. If it’s stuck, use a plastic trim tool (not metal) to avoid scratching the paint. Work slowly around the edges until it pops free.

​Step 3: Clean the Surface​

  • Wipe the headlight nacelle with a microfiber cloth dampened with isopropyl alcohol to remove grease, dirt, or old adhesive. Let it dry completely.

​Step 4: Install the New Trim Ring​

  • Align the new ring with the headlight housing. Most have notches or tabs that match the nacelle’s shape—line these up first.

  • Start screwing in the new screws by hand to avoid cross-threading. Tighten them evenly with a screwdriver, but don’t overtighten (this can strip the plastic or crack the ring).

  • If the ring has a snap-on design, press it firmly into place, working from one side to the other to seat it evenly.

​Step 5: Test and Adjust​

  • Reconnect the battery if you disconnected it.

  • Turn on the headlight to check for proper alignment—no gaps should be visible between the ring and housing.

  • Take a short ride to ensure the ring stays secure at highway speeds (vibration can loosen screws over time).

Common Issues and How to Fix Them

Even with careful installation, problems can arise. Here’s how to address them:

​Issue 1: Trim Ring Feels Loose​

  • ​Cause: Screws not tightened enough, or the ring’s screw holes stripped.

  • ​Fix: Tighten screws incrementally. If holes are stripped, use a thread-locking compound (like Loctite) on the screws or replace the ring with a higher-quality option.

​Issue 2: Scratches or Scuffs on the Ring​

  • ​Cause: Contact with road debris or improper removal/installation.

  • ​Fix: Minor scratches can be buffed out with plastic polish (e.g., Meguiar’s PlastX). Deep scratches may require repainting—use spray paint matched to your bike’s color and apply thin coats with a fine-grit sandpaper (2000-grit) prep.

​Issue 3: Ring Doesn’t Fit Properly​

  • ​Cause: Purchased an incompatible ring or measured incorrectly.

  • ​Fix: Double-check the part number against your FXLRST’s year and headlight type. If it’s a custom ring, contact the manufacturer for sizing adjustments.

​Issue 4: Headlight Alignment Off After Installation​

  • ​Cause: The ring pushed the headlight housing out of place.

  • ​Fix: Loosen the ring screws, adjust the headlight to factory specs (using a beam pattern tester if needed), then retighten the ring.

Maintaining Your Low Rider ST FXLRST Headlight Trim Ring

Proper care extends the life of your trim ring and keeps your bike looking sharp:

  • ​Cleaning: Wash the ring weekly with mild soap and water. Avoid harsh chemicals (e.g., acetone) that can fade or soften plastic.

  • ​UV Protection: Apply a UV-resistant spray (like 3M Trim Restorer) annually to prevent fading, especially if you ride in sunny climates.

  • ​Inspection: Check screws monthly for tightness—vibration can loosen them over time.

  • ​Storage: If storing your FXLRST long-term, cover the front end with a breathable bike cover to prevent dust and debris from accumulating on the ring.

Upgrading Your Trim Ring: Customization Ideas for Enthusiasts

If you’re looking to personalize your FXLRST, consider these trim ring upgrades:

  • ​Contrasting Colors: Pair a black ring with a silver headlight housing or vice versa for a bold, two-tone look.

  • ​Embossed Logos: Some aftermarket rings feature Harley-Davidson logos or custom designs (e.g., “FXLRST” lettering) for added flair.

  • ​Carbon Fiber Accents: For a high-end, sporty vibe, look for rings with carbon fiber patterns—lightweight and durable.

  • ​LED Accents: Some rings have built-in LED strips that sync with your headlight, creating a unique lighting signature (ensure they’re legal in your area).

Final Thoughts: Protecting Your Investment with the Right Trim Ring

The headlight trim ring on your Low Rider ST FXLRST may seem like a small part, but it plays a big role in both form and function. By choosing a high-quality, compatible ring, installing it carefully, and maintaining it regularly, you’ll preserve your bike’s aesthetics, protect its components, and ensure it turns heads for years to come. Whether you stick with factory specs or explore custom options, taking the time to understand this detail will make you a more informed, confident rider—and that’s what owning a Harley-Davidson is all about.

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