Teardrop Trailer Fenders: What They Are and When You Should Use Them

Teardrop trailer fenders are one of the most widely used fender styles in the trailer industry, especially for tandem-axle utility trailers, car haulers, and equipment trailers. Their distinctive center “drop” shape provides structural strength, improved wheel clearance, and a clean, professional appearance.

This guide explains what teardrop fenders are, why the industry prefers them, and when they are the best choice for your trailer.

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1. What Are Teardrop Trailer Fenders?

A teardrop trailer fender is a long, curved fender with a downward center section that sits between two wheels on a tandem-axle trailer.

Key Features

• A smooth radius arch over each wheel

• A center dip or “teardrop” shape between the tires

• A length typically around 72 inches

• Height usually 16–18 inches

• Width 9–10 inches depending on wheel size

This design aligns with common tandem-axle spacing used across the trailer industry.

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2. Why Are They Called “Teardrop” Fenders?

The name comes from the center section, which dips down in a teardrop-like curve.

This feature provides:

• Additional rigidity

• A stronger structural profile

• Better protection between wheels

• A natural point for backing plates or reinforcement

The shape also reduces flexing that can occur with long, flat fenders.

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3. Advantages of Teardrop Fenders

1. Excellent Structural Strength

The teardrop center adds rigidity and reduces vibration. This is crucial for long-span steel fenders on tandem-axle trailers.

2. Perfect for Standard Axle Spacing

Most tandem trailers use similar axle spacing. Teardrop fenders are engineered to match industry-standard gaps.

3. Strong Fitment for 16” and 17.5” Wheels

The profile of teardrop fenders provides proper clearance for:

• 16” trailer wheels

• 17.5” wheels, which require 10-inch width fenders

4. Weld-On or Bolt-On Compatibility

Teardrop fenders work with:

• Weld-on installations (most common)

• Bolt-on brackets

• Hybrid systems (welded brackets + bolted fender)

5. Professional Appearance

These fenders are commonly seen on production trailers from major manufacturers due to their clean, symmetrical look.

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4. Common Teardrop Fender Dimensions

Most tandem trailers use one of the following:

72×10×17 (Industry Standard)

• 72” long

• 10” wide

• 17” tall

• Best for 16” and 17.5” wheels

• Ideal for equipment, utility, and car haulers

72×9×17

• Slightly narrower

• Common for 15”–16” wheels

• Used on lighter-duty setups

69×10 radius

• Alternative to teardrop when shorter length is required

Teardrop is the most universally compatible shape for tandem trailers.

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5. Material Options for Teardrop Fenders

14-Gauge Steel (Most Common)

• Strong

• Weldable

• Ideal for heavy loads

• Industry standard for commercial trailers

16-Gauge Steel

• Lighter but more flexible

• Used on light-duty tandem trailers

Aluminum

• Rarely used for teardrop fenders

• More brittle and harder to weld

• Better suited for radius-style fenders instead

Diamond Plate Steel

• Adds grip and visual appeal

• Additional rigidity

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6. When You Should Use Teardrop Fenders

Teardrop fenders are best when:

✔ You have a tandem-axle trailer

This is the primary purpose of the design.

✔ Your trailer carries heavy loads

The center dip reduces flex and distributes stress.

✔ You want a weld-on, long-lasting solution

Teardrop profiles are easy for welders to mount cleanly.

✔ You’re running 16” or 17.5” wheels

These sizes align perfectly with standard teardrop dimensions.

✔ You need a fender that will not crack under vibration

The teardrop arch minimizes stress points.

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7. When Teardrop Fenders May Not Be Ideal

They may not be the best choice if:

• You have a single-axle trailer

• Your trailer requires a flat-top design

• You’re using aluminum construction

• Axle spacing is non-standard

In those cases, radius or flat-top fenders may be better suited.

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8. Installation Considerations

Weld-On

• Most common method

• Provides maximum strength

• Works well with backing plates

Bolt-On

• Requires pre-drilled holes or custom brackets

• Best for aluminum or removable setups

Always ensure:

• 1-inch side clearance

• 2–4 inches of vertical clearance

• Center dip aligns between tires

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Conclusion

Teardrop trailer fenders are the industry-standard solution for tandem-axle trailers due to their strength, functional design, and compatibility with 16” and 17.5” wheels. Their unique shape reduces flexing, improves durability, and aligns perfectly with most axle spacings, making them a reliable and long-lasting choice for heavy-duty trailers.