Cheap Part Worn Tyres (Tires): UK Rules 2026

Part-worn tyres (tires) in the UK at a glance

Cheap part worn tyres are legal to buy in the UK, but only if they meet the supply rules in the Motor Vehicle Tyres (Safety) Regulations 1994. The legal duty is on the seller. Look for a permanent “PART-WORN” mark, the original E-mark and load/speed index, and no deep cuts or bad repairs. If any of these is missing, the sale is illegal.

What “part-worn” means for US, Canadian and Australian drivers

A part-worn tyre is the UK name for what North American and Australian drivers usually call a used tire: a tyre that has been on a vehicle before and is being sold again. Garages and market traders in the UK sell them openly, often loose or already fitted to a wheel. The regulations cover any part-worn tyre that can be fitted to a motor vehicle or trailer, and they apply to whoever supplies it.

The Trading Standards guidance used for this page covers England, Scotland and Wales. If you are buying in Northern Ireland, check the local rules first.

The markings a legal part-worn tyre must carry

Read the sidewall before you look at the tread. A legal part-worn tyre, unless it is a retread, has two kinds of marking.

Original manufacturer markings. The ECE approval mark (an “E” with a country number, such as E11) and the load and speed index (such as 76 S) must have been moulded into the sidewall when the tyre was made. If either is missing or unreadable, the tyre cannot legally be sold as part-worn. For tyres marked to the older British standard BS AU 144e, a speed category symbol and a load capacity marking must be present.

The “PART-WORN” mark. The words must be in upper-case letters at least 4 mm high. They must be permanent and legible, and placed next to every approval mark on the tyre. The seller may not hot-brand them or cut them into the rubber, because both methods weaken the sidewall. Most legitimate sellers use rubber labels bonded on by cold vulcanising. A chalk mark or a paper sticker does not count.

Retreaded part-worns. A retread must carry a permanent mark identifying the original model and manufacturer and the word “RETREAD” moulded on or into the sidewall in letters at least 4 mm high, along with the relevant ECE markings. “PART WORN” must then appear next to the “RETREAD” mark.

Condition rules: cuts, damage and repairs

The condition rules apply whether the tyre is deflated or inflated to the highest pressure it is designed for. Some damage only shows under pressure, and a seller who supplies a tyre with one of the listed defects commits an offence even if the defect only appears once the tyre is inflated. A careful seller therefore inflates and inspects loose tyres before selling them.

The most specific rule covers cuts: under the Motor Vehicle Tyres (Safety) Regulations 1994, a part-worn tyre must not have a cut on the outside longer than 25 mm (about 1 in) or 10% of the tyre’s section width, whichever is greater, if it is deep enough to reach the ply or cord. On a wide tyre the 10% figure can be the larger limit, so the permitted cut length depends on the tyre size. The guidance also lists internal and external structural defects that rule a tyre out. Any lump, bulge or exposed cord on the sidewall is a reason to walk away. The tyre sidewall damage guide shows what these look like.

Any repair must comply with British standards. A plug pushed in from outside, or a repair in the shoulder or sidewall, is a warning sign. The puncture repair vs replace guide explains where a tyre can and cannot be repaired properly.

The regulations also set a minimum tread depth for part-worn tyres at the point of sale. Measure the shallowest groove yourself rather than trusting the seller’s figure. Then put the measurement into the tyre wear calculator to see how much use is left before the tyre reaches the legal limit for driving.

Why the cheapest part-worn can cost more

Paying less up front leaves you with three unknowns the price tag doesn’t show:

• History. You don’t know if the tyre has been driven flat or under-inflated. Either can damage the inside of the casing while the tread still looks fine.
• Age. A part-worn tyre may be several years old before it reaches you. Check the DOT date code on the sidewall and compare it with the tyre age guide.
• Remaining tread. A part-worn tyre starts with less tread than a new one, so it will need replacing sooner.

What to do: buy, question or walk away

Buy only when all of the following are true:

1. “PART-WORN” is permanently applied in capitals at least 4 mm high, next to each approval mark.
2. The E-mark and the load/speed index are moulded in and readable, and they match what your car’s handbook or door placard specifies.
3. You can see no cuts reaching the cords, no bulges and no sidewall repairs, with the tyre inflated.
4. The date code is readable and the tyre isn’t old for its condition.
5. Your own tread-depth measurement is even across the full width.

Question the seller if a tyre has a repair. Ask what standard it was repaired to, and ask how the tyre was checked before sale.

Walk away if the “PART-WORN” mark is missing, hand-written, burned in or cut in, or if the tyre was never inflated in front of you. Selling such a tyre breaks the rules, and the seller is responsible. Report unsafe part-worn tyres to the local council’s Trading Standards service.

Sources

• Pembrokeshire County Council Trading Standards, Part-worn tyres (guidance on the Motor Vehicle Tyres (Safety) Regulations 1994 for England, Scotland and Wales): https://www.pembrokeshire.gov.uk/trading-standards-information/part-worn-tyres