After researching dozens of train horn kits designed for spare tire mounting, we compared manufacturer specifications, safety standards, and aggregated owner feedback to find the best options for different needs. Spare tire mounts require compact, weather-resistant kits that can fit within the wheel well and withstand road debris. Our evaluation focuses on loudness, durability, ease of installation, and value. Whether you want maximum decibels or a budget-friendly upgrade, this guide will help you choose.
| Photo | Product | Score | Buy |
|---|---|---|---|
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HornBlasters O2 Train Horn Kit Best Overall 3 trumpets, 150 dB, 1.5 gallon tank, 150 PSI max |
9.0 | 🛒 Check Price |
 |
Vixen Horns VXO8309 Train Horn Kit Best Value 3 trumpets, 150 dB, 1 gallon tank, 200 PSI max |
8.7 | 🛒 Check Price |
 |
Wolo 8470 Sonic Blaster Train Horn Most Compact 2 trumpets, 140 dB, 0.5 gallon tank, 120 PSI max |
8.4 | 🛒 Check Price |
 |
Kleinn Air Horns AMT3-150 Train Horn Kit Premium Pick 3 trumpets, 150 dB, 1.5 gallon tank, 200 PSI max, stainless steel |
9.2 | 🛒 Check Price |
 |
Extreme Air Horns EA-3000 Train Horn Kit Loudest 4 trumpets, 155 dB, 2 gallon tank, 200 PSI max |
8.1 | 🛒 Check Price |
 |
SoundOriginal Train Horn for Trucks Budget Friendly 3 trumpets, 140 dB, 0.8 gallon tank, 150 PSI max |
7.8 | 🛒 Check Price |
 |
GAMPRO 12V Train Horn Kit Compact Alternative 2 trumpets, 135 dB, 0.5 gallon tank, 120 PSI max |
7.3 | 🛒 Check Price |
1. HornBlasters O2 Train Horn Kit: Best Overall
The HornBlasters O2 is a top performer in our evaluation, delivering a genuine train horn sound at 150 dB. Owner feedback consistently praises its deep tone and reliability. The brass trumpets are corrosion-resistant, and the included compressor is robust. However, the 1.5 gallon tank requires ample space, so measure your spare tire area carefully. Some users report that the kit does not include a mounting bracket for the spare tire, requiring additional fabrication. If you have a compact spare or limited space, this kit may not fit without modification.
We recommend this kit for truck owners who want the loudest, most authentic sound and have a full-size spare tire mount with adequate room. If your spare tire is undersized or you prefer a simpler installation, consider a smaller kit.
- Three chrome-plated brass trumpets produce a deep, authentic train sound.
- 150 dB rating meets most legal limits while being extremely loud.
- Includes 1.5 gallon tank and 150 PSI heavy-duty compressor.
Pros: Authentic train horn sound quality.; Durable brass construction resists corrosion.
Cons: Larger tank may not fit all spare tire wells.
2. Vixen Horns VXO8309 Train Horn Kit: Best Value
The Vixen Horns VXO8309 offers an excellent balance of performance and affordability. In our comparison, it provides 150 dB output with a slightly smaller 1 gallon tank that fits most spare tire wells without modification. Owner feedback highlights easy installation and a loud, clear sound. However, the trumpets are steel with chrome plating, which may be less durable than brass in harsh weather. Some users noted rust after prolonged exposure to road salt.
This kit is ideal for budget-conscious buyers who still want a powerful train horn sound. If you live in an area with heavy road salt or frequent rain, you may want to invest in a brass trumpet kit for better longevity.
- Three chrome trumpets with a 150 dB output.
- 1 gallon tank fits most spare tire mounts.
- Includes all necessary hardware and wiring.
Pros: Great value for the price.; Compact tank fits well in spare tire area.
Cons: Trumpets are chrome-plated steel, not as corrosion-resistant as brass.
3. Wolo 8470 Sonic Blaster Train Horn: Most Compact
If space is your primary constraint, the Wolo 8470 is a top candidate. Its half-gallon tank and dual trumpets fit easily behind most spare tires. Owner feedback indicates straightforward installation with basic tools. The 140 dB output is still attention-getting, but not as deafening as larger kits. Some users mention that the sound is more like a loud truck horn than a true train horn. Durability is adequate, but the plastic trumpets may crack in extreme cold.
This kit is best for those with limited mounting space who still want a significant upgrade over a factory horn. If you need the loudest possible sound, look at larger kits.
- Dual trumpet design for a compact footprint.
- 140 dB output is loud but not extreme.
- 0.5 gallon tank fits almost any spare tire mount.
Pros: Very easy to install due to small size.; Works well with limited space.
Cons: Lower dB than most train horns.
4. Kleinn Air Horns AMT3-150 Train Horn Kit: Premium Pick
The Kleinn AMT3-150 stands out for its stainless steel trumpets, which offer superior durability compared to brass or chrome-plated steel. In our evaluation, it delivers a rich, loud train horn sound that owners rave about. The 1.5 gallon tank and powerful compressor ensure consistent performance. However, the premium build comes at a higher cost, and the tank size may be too large for some spare tire mounts. Some users reported that the mounting bracket requires modification to fit their specific truck.
This kit is for enthusiasts who want the best materials and are willing to invest more. If you have a tight budget or limited space, consider other options.
- Stainless steel trumpets for maximum corrosion resistance.
- 150 dB output with a deep, resonant tone.
- High-quality compressor and tank included.
Pros: Premium stainless steel construction.; Excellent sound quality and loudness.
Cons: Higher price point.
5. Extreme Air Horns EA-3000 Train Horn Kit: Loudest
The Extreme Air Horns EA-3000 is the loudest kit we researched, with a claimed 155 dB. Owner feedback confirms it is ear-splittingly loud. However, the 2 gallon tank is massive and often requires custom mounting outside the spare tire area. Several users reported issues with the compressor failing after a few months. The plastic trumpets also feel less durable than metal alternatives. Installation is complex due to the size and wiring.
This kit is only for those who prioritize maximum loudness above all else and have the space and willingness to fabricate a custom mount. If you want a reliable, easy-to-fit kit, skip this one.
- Four trumpets produce 155 dB, extremely loud.
- 2 gallon tank for long blast duration.
- Includes remote control for wireless operation.
Pros: Highest decibel rating in our list.; Remote control adds convenience.
Cons: Very large tank may not fit most spare tire mounts.; Lower build quality reported by some owners.
6. SoundOriginal Train Horn for Trucks: Budget Friendly
The SoundOriginal train horn is a budget option that still provides a decent upgrade. In our evaluation, the 140 dB output is adequate but not as deep or loud as premium kits. Owner feedback is mixed: some appreciate the low cost, while others note that the sound is more like a loud air horn than a train horn. The plastic trumpets are lightweight but less durable, especially in cold climates. Installation is straightforward, and the kit includes most needed hardware.
This is a good choice for those on a tight budget or for occasional use. If you want a long-lasting, authentic train horn, invest in a metal trumpet kit.
- Three trumpets with 140 dB output.
- 0.8 gallon tank fits most spare tire mounts.
- Affordable price point.
Pros: Very affordable.; Compact tank fits well.
Cons: Lower sound quality and volume.; Plastic trumpets may crack over time.
7. GAMPRO 12V Train Horn Kit: Compact Alternative
The GAMPRO 12V kit is one of the smallest we evaluated, making it an option for trucks with very limited space. However, its 135 dB output is noticeably quieter than other kits, and owner feedback describes the sound as more of a loud honk than a train horn. The plastic trumpets and small compressor are adequate for occasional use but may not hold up to frequent use. Installation is simple, and the price is low.
This kit is best for those who only need a slight volume increase and have severe space constraints. If you want a true train horn experience, look for a kit with at least 140 dB and metal trumpets.
- Dual trumpet compact design.
- 135 dB output, moderate loudness.
- Small tank fits tight spaces.
Pros: Very compact and easy to install.; Works well for small trucks.
Cons: Not very loud compared to others.; Sound quality is somewhat tinny.
Frequently Asked Questions
Will a train horn fit behind my spare tire?
Fitment depends on the size of your spare tire and the depth of the wheel well. We recommend measuring the available space (height, width, and depth) and comparing it to the tank and trumpet dimensions in the product specifications. Most compact kits with 0.5 to 1 gallon tanks fit standard spare tire mounts, while larger tanks may require custom mounting elsewhere.
Is it legal to use a train horn on my truck?
Laws vary by state and country. Generally, train horns are legal if they do not exceed a certain decibel limit (often around 100-110 dB for aftermarket horns). However, many train horns produce 140-150 dB, which may be illegal for on-road use. We recommend checking your local noise ordinances and using the horn responsibly, primarily off-road or for emergency situations.
Do I need to upgrade my truck's air system for a train horn?
Most train horn kits come with a standalone compressor and tank, so they do not require tapping into your truck’s existing air system. However, you must ensure your electrical system can handle the compressor’s current draw (usually 15-30 amps). Some trucks may need a relay or upgraded wiring.
How do I mount a train horn to my spare tire?
Most kits include brackets that attach to the spare tire mount or the wheel itself. Some users fabricate custom brackets using the spare tire bolts. Ensure the horns are securely fastened and do not interfere with the spare tire’s function or the tailgate. We recommend following the manufacturer’s instructions and using thread-locking compound on bolts.
What maintenance does a train horn require?
Periodically check for air leaks, corrosion, and loose connections. Drain moisture from the tank by opening the drain valve. Clean the trumpets with a soft cloth and protect metal surfaces with a corrosion inhibitor. If you live in a cold climate, consider a kit with an automatic drain to prevent freezing.
Our Verdict
After comparing specs, owner feedback, and safety considerations, our top pick is the HornBlasters O2 Train Horn Kit for its authentic sound, robust build, and proven reliability. For those on a budget, the Vixen Horns VXO8309 offers great value without sacrificing too much performance. If you have the space and want premium materials, the Kleinn AMT3-150 is a worthy investment.
