Ask for one and you'll often be quoted for both. Sometimes that's fair — they're commonly done in the same visit — but they solve entirely different problems, and knowing which is which keeps you in control of the bill.

Alignment: the angles of your wheels

Alignment (or tracking) sets the angles at which your tyres meet the road. Clout a pothole or kerb hard enough — a near-inevitability on UK roads after winter — and those angles shift. The classic symptoms are a car that pulls to one side, a steering wheel that sits off-centre, or tyres wearing unevenly across their width.

Balancing: the weight distribution of each wheel

Balancing corrects tiny weight imbalances in the wheel-and-tyre assembly using small weights clipped to the rim. The classic symptom is a steering wheel or seat that vibrates at a particular speed — often around 50–70 mph on the motorway.