Question 1

What do kerb weight, gross vehicle weight and payload mean?

Accepted Answer

Three different figures that get used interchangeably and are not interchangeable at all — and getting them wrong is how people end up driving overloaded, which is an offence.

**Kerb weight.** The weight of the vehicle **ready to drive but empty of people and luggage** — including a full tank of fuel, all fluids, and standard equipment. Definitions vary slightly between manufacturers and standards, some including an allowance for the driver, which is why quoted figures differ.

**Gross vehicle weight (GVW)**, also called **maximum authorised mass (MAM)** or gross vehicle mass. The **maximum the vehicle may legally weigh** when loaded — set by the manufacturer based on the chassis, suspension, brakes and tyres. This is a legal limit, not a recommendation.

**Payload.** GVW minus kerb weight. What you can actually put in: passengers, luggage, tools, roof box, towbar, accessories, and anything else.

**Where people get caught out.** Payload is frequently far smaller than assumed. Four adults and their luggage can approach or exceed it in a small car, and motorhomes are notorious — the payload after factory options can be a few hundred kilograms, before water, gas, bikes or awnings.

**Optional extras reduce payload directly**, since every fitted option adds to kerb weight while GVW stays fixed.

**Axle limits matter too.** Each axle has its own maximum, and it is possible to be within the total GVW while overloading one axle — commonly the rear, with a heavy load at the back or a high towball download.

**The towing figures**, which add a further layer:

**Gross train weight (GTW)** — the maximum for vehicle **and** trailer combined.

**Maximum towing capacity**, frequently quoted separately for braked and unbraked trailers.

**Nose weight** — the download the trailer applies to the towball, which has its own limit and counts toward the towing vehicle's rear axle load.

**Where to find the numbers.** The **VIN plate**, usually in the door aperture or under the bonnet, lists the limits in a standard order: gross vehicle weight, gross train weight, then individual axle limits.

**Overloading is an offence**, affects braking and handling, and can invalidate insurance.

Question 2

What do driving licence categories actually mean?

Accepted Answer

Each category is a letter code on the back of your licence specifying a class of vehicle you may drive — and the codes matter because people routinely drive things they are not entitled to,

Question 3

What is nose weight, and why does towing stability depend on it?

Accepted Answer

Nose weight is the downward force the trailer's coupling applies to the towball — and getting it right is the single most important factor in whether a trailer tows stably or begins to snake. Why it

Question 4

What do the numbers on a tyre sidewall mean?

Accepted Answer

A code such as 205/55 R16 91V describes the tyre's dimensions, construction and limits. Each part means something specific, and matching them matters more than most drivers realise. is the section

Question 5

What do you need to ride a motorcycle, and how does the licence work?

Accepted Answer

A staged licensing system based on age and power, which is deliberately structured so that access to more powerful machines is earned progressively — and the route you take depends heavily on what

Question 6

What does a car's VIN tell you?

Accepted Answer

A Vehicle Identification Number is a 17-character code uniquely identifying one specific vehicle. It is standardised internationally, and it is the most reliable identifier a car has — far more so

Question 7

What counts as a classic car, and what exemptions apply?

Accepted Answer

There is no single definition — the term means different things for tax, for MOT, for insurance and for club membership, and conflating them is the source of most confusion about what a classic car

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