Hub Centric Spigot Rings Sizing Chart: Most Common UK Alloy Wheel Bore Conversions
Quick Spigot Ring Reference: A spigot ring (hub-centric ring) adapts the larger aftermarket centre bore of an alloy wheel to fit snugly against the vehicle's smaller hub spigot lip. Sized as Outer Diameter (Wheel Bore) × Inner Diameter (Hub Lip) in millimetres (e.g. 73.1 – 57.1), spigot rings ensure the wheel is perfectly concentric with the axle, permanently eliminating steering wheel vibrations at 50–70 MPH. Find your exact sizing combination in our UK conversion matrix below.
1. What Does a Spigot Ring Do & Why Is It Essential?
When aftermarket alloy wheel manufacturers (such as Wolfrace, Team Dynamics, BBS, Rota, and Japan Racing) produce wheels, they cannot cast a custom wheel for every car model's specific hub dimension. Instead, they machine the wheel's centre bore to a generous universal diameter — typically 73.1mm or 72.6mm.
However, your vehicle's wheel hub has a precision cylindrical metal lip (the spigot lip) designed to carry the wheel's weight. For instance, Volkswagen and Audi hubs have a 57.1mm lip.
If you bolt a 73.1mm wheel directly to a 57.1mm hub without a spigot ring, a 16.0mm radial gap exists. Even if you tighten all five wheel bolts carefully, the wheel will sit fractions of a millimetre off-centre. As soon as you reach 50–70 MPH on the motorway, the eccentric rotation creates a violent, harmonic vibration through the steering wheel and chassis.
2. How to Read Spigot Ring Sizing: Outer Diameter vs Inner Diameter
Spigot rings are designated by two numbers separated by a hyphen or cross (e.g., 73.1 – 57.1):
- Outer Diameter (OD = 73.1mm): The external diameter of the ring. This must match the internal centre bore hole of your alloy wheel.
- Inner Diameter (ID = 57.1mm): The internal hole through the ring. This must match the external diameter of your vehicle's metal hub spigot lip.
3. The Definitive UK Spigot Ring Sizing & Conversion Chart
Use this authoritative reference table to find the exact spigot ring size required for the most common UK aftermarket alloy wheel conversions:
| Spigot Ring Size (OD – ID) | Wheel Bore (OD) | Hub Spigot (ID) | Common Vehicle Applications | Common Wheel Brands |
|---|---|---|---|---|
| 73.1 – 57.1 | 73.1 mm | 57.1 mm | VW Golf / Polo, Audi A3 / TT, Seat Leon, Skoda Octavia | Wolfrace, Japan Racing, Rota, Calibre |
| 73.1 – 60.1 | 73.1 mm | 60.1 mm | Renault Clio / Megane, Toyota Yaris, Vauxhall Vivaro C | Aftermarket 4x100 / 5x114.3 |
| 73.1 – 64.1 | 73.1 mm | 64.1 mm | Honda Civic, Type-R, Accord, CR-V, Land Rover Freelander 1 | Enkei, Rota, Team Dynamics |
| 73.1 – 66.1 | 73.1 mm | 66.1 mm | Nissan Qashqai, 350Z, 370Z, Juke, Renault Trafic III | Aftermarket 5x114.3 |
| 73.1 – 67.1 | 73.1 mm | 67.1 mm | Mazda 3 / 6 / MX-5 (NC), Hyundai i30 / Tucson, Kia Sportage | Aftermarket 5x114.3 |
| 72.6 – 71.1 | 72.6 mm | 71.1 mm | Vauxhall Vivaro A (2001–2014) & Renault Trafic II fitting BMW Wheels | OEM BMW 5x120 Alloy Wheels |
| 72.6 – 65.1 | 72.6 mm | 65.1 mm | Vauxhall Astra / Vectra / Zafira, Peugeot / Citroen | Aftermarket 5x110 / 5x108 |
| 72.6 – 57.1 | 72.6 mm | 57.1 mm | VAG Vehicles (VW Golf / Caddy) fitting BMW Style Wheels | Aftermarket 5x112 with 72.6 Bore |
| 66.6 – 57.1 | 66.6 mm | 57.1 mm | VW Golf / Audi A3 fitting Modern Audi A4 (B8+) or Mercedes Wheels | OEM Audi / Mercedes 66.6 Bore |
| 60.1 – 57.1 | 60.1 mm | 57.1 mm | VAG Models fitting Renault or Toyota OEM 4x100 Alloy Wheels | OEM Renault 60.1mm Wheels |
Hub Centric Spigot Rings (Pack of 4) - All UK Sizing In Stock
High-grade CNC machined polycarbonate spigot rings. Eliminates steering wheel vibration permanently. Zero corrosion, thermal stability up to 250°C, guaranteed perfect fitment.
4. Polycarbonate vs Aluminium Spigot Rings: Why Polycarbonate Wins in the UK
Customers frequently ask whether metal aluminium or plastic polycarbonate spigot rings are superior. In the British climate, high-impact polycarbonate spigot rings are strongly recommended for daily road use:
- Zero Galvanic Corrosion: When aluminium rings touch steel vehicle wheel hubs exposed to salted UK road spray, galvanic oxidation occurs. The aluminium ring chemically welds itself to the hub, requiring a hammer and chisel to remove during puncture repairs. Polycarbonate is completely impervious to corrosion.
- Thermal Stability: Premium polycarbonate spigot rings withstand operating temperatures well beyond 200°C, easily resisting high brake heat without warping or deforming.
- Centering Function: Remember that spigot rings only carry radial alignment forces to centre the wheel while the bolts are tightened. Once wheel bolts or nuts are torqued, the clamping friction between the wheel face and the hub carries 100% of the vehicle load. Plastic spigot rings will never compress or fail under vehicle weight.
5. How to Measure Your Wheel & Hub If You Are Unsure
- Use a Digital Vernier Caliper: Do not use a tape measure or tape ruler. Spigot ring tolerances are measured to a tenth of a millimetre (0.1mm).
- Measuring the Wheel Bore (OD): Measure across the inner circular recess on the back mounting face of the wheel. Take 3 readings at different angles to ensure concentric accuracy (common readings: 73.1mm, 72.6mm, 66.6mm).
- Measuring the Vehicle Hub Lip (ID): Clean all rust from the hub spigot lip with a wire brush. Measure across the outer diameter of the raised metal collar (common readings: 57.1mm for VW, 65.1mm for Vauxhall, 71.1mm for Vivaro).
6. Frequently Asked Questions (FAQ)
Q: Will spigot rings pass a UK MOT inspection?
Yes. Spigot rings are fully road legal and compliant with UK MOT test standards. In fact, driving without spigot rings on wheels with an oversized centre bore can cause severe wheel wobble, bearing wear, and loose wheel bolts, resulting in immediate MOT rejection under steering and suspension safety criteria.
Q: My spigot ring got stuck inside the wheel. How do I get it out?
If a polycarbonate ring remains lodged inside the wheel centre bore when dismounting, gently pry around the bevelled rear edge with a flat plastic trim tool or blunt flathead screwdriver. They pop out easily without scratching the alloy paint.
Q: Do factory OEM wheels require spigot rings?
Factory OEM wheels manufactured specifically for your vehicle model have a factory direct-bored centre hole that fits your hub exactly without spigot rings. Spigot rings are only required when fitting aftermarket universal wheels or OEM wheels from a different vehicle manufacturer with a larger bore (such as BMW wheels on a Vivaro, or modern Audi wheels on a Golf).
