🚗 What the Registration Checker Uses
The registration checker uses manufacturer‑supplied original equipment (OE) data.
This data confirms:
- Tyre sizes the vehicle was fitted with as standard
- Specifications recorded at factory build
It does not track changes made after the vehicle leaves the production line.
❓ Why Doesn’t the Checker Show the Tyre Size on the Vehicle?
After manufacture, tyre sizes may change due to:
- Dealer upgrades or promotions
- Wheel changes by previous owners
- Approved conversions to alternative sizes
These changes are not recorded against the registration, meaning the system cannot confirm if the vehicle still has its original tyres fitted.
👉 If the displayed size differs from expectations:
- Check the tyre sidewall on the vehicle
- Refer to the vehicle handbook
- Confirm with the vehicle manufacturer, if required
🔄 Why Are the Checker Results Different to the Vehicle?
The checker always returns approved OE fitment options for that make and model.
Differences typically occur where:
- The vehicle has been modified
- Multiple manufacturer‑approved sizes exist
- Front and rear tyre sizes differ
✅ Best practice is to match the currently fitted tyre size, unless a confirmed change has been approved by the manufacturer.
🔁 Why Are Multiple Tyre Sizes Shown?
Some vehicles are designed with:
- Different front and rear tyre sizes
This is common on certain manufacturers, including:
- BMW
- Audi
- Mercedes‑Benz
Where applicable, the checker will display:
- The correct front size
- The correct rear size
⚠️ Any deviation from the fitted sizes should only be made following manufacturer confirmation.
🏎️ Why Are Different Speed Ratings Displayed?
Multiple speed ratings may appear for several valid reasons:
1️⃣ “Any speed rating” was selected, displaying all suitable in‑stock options
2️⃣ Higher speed ratings are included where appropriate, offering greater availability and pricing flexibility
3️⃣ Seasonal tyres, such as winter tyres, may have lower speed ratings
✅ Higher speed ratings are acceptable if suitable for the vehicle.
⚠️ When fitting a higher speed rating than OE, tyres should be replaced in pairs across the axle.
💷 Why Is the Same Tyre Listed More Than Once at Different Prices?
Tyres that appear similar may differ in:
- Speed rating
- Load index
- Manufacturer specification version
- EU tyre label scores
Older or updated versions of the same model can carry different performance ratings, which affects pricing.
✔️ Key Points
- Registration checker data is based on the original manufacturer fitment
- Post‑factory tyre changes are not recorded
- Multiple sizes or speed ratings can all be valid
- The currently fitted tyre size should be matched wherever possible
- Advisors should guide verification before order confirmation