Why a number plate beats a tyre size.

The size issue is where customers drop off

Every step in a booking flow loses some people. The tyre size field loses a disproportionate share, because it is the only step that asks the customer for information they have to go outside and find.

What follows is worse than just a drop-off. Some abandon, some guess, and many guesses are wrong, leading to incorrect orders, wasted bay slots, and refund discussions.

A vehicle registration lookup replaces that field with something every driver has memorised or can read off the paperwork in front of them.

What the lookup returns

A registration resolves to a specific vehicle, and from the vehicle you can derive far more than a size.

• The original equipment fitment, including staggered setups with different front and rear.
• Load index and speed rating specified by the manufacturer are requirements, not preferences.
• Alternative approved sizes, allowing you to provide options without suggesting ill-fitting choices.
• Fuel type and body style, enabling you to display the correct services alongside the tyres.
• Sufficient detail to pre-fill a service booking, requiring minimal input from the customer.

The key point is to stop selling sizes and start selling fitments. Customers see options that match their actual car, making it more useful and reducing errors.

Fewer incorrect orders is the hidden saving

Conversion is the main benefit, while the error rate impacts your margins.

Ordering the wrong size based on a guessed fitment incurs costs for returns, restocking, lost bay space, and a customer who feels less confident than before.

Matching to the actual vehicle eliminates most issues. It ensures fitting notes are accurate: specific load ratings or torque figures are known before loading the van, not discovered on-site.

Where it fits in the process

Prioritise the lookup, making everything that follows simpler.

The effective pattern is registration, then confirming the vehicle to the customer in simple terms, followed by displaying compatible options with fitted prices. The confirmation step is crucial: a customer who sees their car accurately described trusts the prices shown.

Maintain a manual size entry for those who need it, including trade customers and vehicles not covered by the data. It should be an alternative, not the default.

What to do if the lookup fails to find a car

No data source is perfect; how you manage a miss can cost you the booking.

1. Allow manual size entry instead of hitting a dead end or error.
2. Provide an option for a sidewall photo, as a customer can send one in seconds.
3. Capture the registration regardless, so someone can follow up instead of losing the enquiry.
4. Log the misses. A pattern of failures on a specific make or age of vehicle is a data issue worth addressing.

The failure path is where most implementations falter, and it's what customers remember.

Market coverage

A garage in one country needs one registration format; a network across several needs many, which behave differently.

Plate formats, the data behind them, and legal exposure vary, so a lookup that works in one area may yield little in another. If you operate across borders, check this before it becomes a support issue.

The same goes for storefront language. Asking for a number plate, registration, or licence plate is the same question in different markets; using local terms reduces hesitation.