Why a car pulls to one side after fitting

"The car pulls since you changed the tyres" is a call every workshop knows. The cause is usually elsewhere — but the customer connects it to you.

The usual causes

• Pressure — one tyre a few tenths of a bar down pulls the whole car.
• Geometry — wheels misaligned before fitting now show on fresh tread.
• Rotation direction — a directional tyre mounted backwards.
• Conicity — rare manufacturing quirk; swapping the tyre side-to-side confirms it.

What to tell the customer

Check pressure first — free and instant. If it persists, a quick test drive and a geometry check. Most cases close in fifteen minutes; the ones that do not become a documented claim.

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