Description
Heavy-Duty 1" Wheel Washers — Polaris 4/156mm Wheel Adapter Kit (Set of 4)
The iFJF 1-inch wheel washer kit solves a common Polaris off-road problem: mounting aftermarket 12mm-lug wheels onto factory 3/8" studs. These precision-machined billet aluminum spacers perfectly center 12mm lug-hole wheels on 3/8" studs, eliminating the dangerous wobble and vibration caused by the size mismatch. A must-have upgrade when running aftermarket wheels on your RZR or Ranger.
Key Features
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Billet Aluminum Construction: 6061-T6 aluminum — strong, lightweight, and corrosion-proof
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Perfect Centering: Machined to exact tolerances to center 12mm wheel holes on 3/8" studs
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1-Inch Thickness: Provides stable wheel mounting without excessive track width change
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4/156mm Bolt Pattern: Designed specifically for Polaris 4-lug hubs
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Set of 4: Complete kit for all four wheels on your machine
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Anodized Finish: Hard anodized for scratch resistance and long-term durability
Compatibility
| Vehicle |
Year Range |
Bolt Pattern |
| Polaris RZR 800 |
2008–2014 |
4/156mm |
| Polaris RZR 900 / 900S / XP 1000 |
2014–2020 |
4/156mm |
| Polaris Ranger 500 |
2008–2014 |
4/156mm |
| Polaris Ranger 800 |
2008–2014 |
4/156mm |
| Polaris General 1000 |
2016–2020 |
4/156mm |
⚠️ Verify your bolt pattern is 4/156mm with 3/8" studs before ordering. Later model Polaris machines (2020+) may use M12 studs that don't require these washers.
Specifications
| Specification |
Value |
| Material |
6061-T6 Billet Aluminum |
| Thickness |
1 inch (25.4mm) |
| Inner Diameter |
3/8" (9.5mm) — fits factory studs |
| Outer Diameter |
12mm shoulder — fits aftermarket wheels |
| Bolt Pattern |
4/156mm |
| Quantity |
4 washers (one per wheel) |
| Finish |
Hard Anodized |
Why You Need These Washers
Many popular aftermarket UTV wheels (Method, STI, ITP, System 3, Fuel) use 12mm lug holes — but pre-2020 Polaris machines use 3/8" (9.5mm) studs. Without proper centering washers, the wheel can shift off-center, causing:
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Severe Vibration: Off-center wheels create dangerous high-speed wobble
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Lug Nut Loosening: Improper seating leads to nuts backing off under vibration
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Stud Damage: Concentrated stress can bend or shear wheel studs
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Uneven Tire Wear: Wobbling wheels create irregular tread wear patterns
Installation Instructions
- Jack up the machine and secure with jack stands
- Remove the wheel (4 lug nuts)
- Slide one 1" washer onto each of the 4 wheel studs
- Mount the aftermarket wheel, ensuring the wheel seats against the washers — not the hub
- Hand-start all 4 lug nuts to confirm proper alignment
- Torque lug nuts to Polaris specification (typically 90–100 ft-lbs) in a star pattern
- Repeat for all 4 wheels
- Re-torque lug nuts after the first 50 miles of riding
⚠️ Important: These washers add 1" of effective offset to each wheel. Verify your fender clearance before riding aggressively.
Frequently Asked Questions
Q: Do I need these for OEM Polaris wheels?
A: No. OEM Polaris wheels already have 3/8" lug holes matched to the factory studs. These washers are only needed when mounting aftermarket wheels with 12mm lug holes.
Q: Will this push my wheels out 1 inch?
A: Yes. The washers add approximately 1" of effective wheel offset. Make sure your fender flares can accommodate the extra width — especially if you're already running wider tires.
Q: Can I use these on a 2021+ Polaris RZR?
A: 2020 and newer Polaris models switched to M12 wheel studs from the factory, so these centering washers are typically not needed. Check your stud size first.
Q: Do I need longer lug nuts?
A: Most aftermarket wheels come with their own lug nuts designed for 12mm applications. Your factory Polaris lug nuts are sized for 3/8" studs. Use the lug nuts that came with your aftermarket wheels.
Q: Are these strong enough for hard trail riding?
A: Yes! 6061-T6 billet aluminum has a tensile strength of 45,000+ PSI. These washers can handle the most aggressive rock crawling, mud riding, and dune running.
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