18x9.50-8 ATV Quad and Trailer Tyres - Set of 4
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Product Information
Full details
The Parnells 18x9.50-8 ATV and trailer tyre set is designed for owners of off-road vehicles, agricultural quads, and utility trailers seeking a reliable, street-legal replacement option. These 4-ply tubeless tyres provide exceptional durability and traction on rugged terrain while maintaining compliance for road use; however, users should be aware that the 255lb load capacity per tyre requires careful weight distribution when hauling heavy equipment.
All features
| Model Part Number | EC1073 |
|---|---|
| Brand | Parnells |
Extended Product Information
FAQs
Are these tyres sold as a complete wheel assembly?
No, this product is a set of four tyres only; rims are not included.
Can I use these on a trailer that exceeds 1000lbs?
The combined load capacity for four tyres is 1020lbs. Do not exceed this total gross weight including the weight of the trailer itself.
What does the 4-ply rating mean?
It refers to the strength of the tyre carcass, indicating it has a durability equivalent to four layers of cotton cord, providing excellent resistance to sharp objects.
Is the tyre pressure strictly 10psi?
Yes, 10psi is the rated pressure to achieve the maximum load capacity of 255lbs per tyre.
Do I need to install inner tubes?
These are designed as tubeless tyres, so they do not require inner tubes provided your rims are in good condition.
Troubleshooting
Difficulty seating the bead
Apply high-quality tyre bead lubricant and use a rapid air burst tool to ensure the bead expands evenly against the rim.
Tyre loses pressure over time
Check the valve stem core for tightness and inspect the rim bead surface for debris or corrosion that might prevent a proper seal.
Pros and Cons
Pros
- Fully E-marked for road legality
- Durable 4-ply carcass for puncture resistance
- High-traction P361-03 tread pattern
- Set of four provides a consistent grip across all wheels
Cons
- Maximum load capacity of 255lbs per tyre
- Requires proper PSI maintenance for optimal performance
- Not intended for high-speed highway use
Setup, Compatibility & Care
Before installation, ensure your rim diameter is exactly 8 inches to accommodate the 18x9.50-8 sizing. Since these are tubeless, ensure the rim bead surface is clean, free of rust, and smooth to create an airtight seal. It is recommended to use a professional tyre mounting machine to avoid damaging the bead. Maintain a consistent pressure of 10psi; checking pressure weekly is advised if the tyres are used frequently on mixed terrain. Store out of direct sunlight to prevent premature rubber hardening or UV cracking.