Replacing trailer tyres

When it comes to replacing trailer tyres, those that you choose must be capable of sustained running at 60mph with the trailer at Maximum Authorised Mass (MAM), otherwise known as maximum gross weight.

Radial and cross ply tyres must not be mixed on the same axle. In the interests of added safety, it is also recommended that tyres of the same size, load index and speed rating as the originals are fitted. This information can be found on the sidewall of the tyre.

Trailer tyre load index

Load Index for Trailer TyresThe load index is a numerical code you will find on the tyre sidewall. It is associated with the maximum load a tyre can carry when travelling at the speed indicated by the associated speed symbol. This is under service conditions specified by E.T.R.O 1991, passenger car tyres section 13. The table shows the load index of the most commonly found trailer tyres and the maximum weight per tyre.

Key | LI = Load Index kg = Maximum Load (kg)

Trailer speed symbols

Trailer Tyre Speed Symbols

The speed symbol is also displayed on the tyre sidewall. This indicates the speed at which the tyre can carry a load corresponding to the load index under service conditions specified by the tyre manufacturer. The speed symbols for trailer tyres as specified by E.T.R.O 1991, passenger car tyres section 13, are displayed in the table.

An increase of 10% over the load capacity quoted in the tables is permitted when tyres are fitted to trailers with a maximum operating speed up to 100 km/h (60mph). If the load capacity is increased by 10% the basic inflation pressure of the tyres should be increased by 3psi or 0.2 bar.

Trailer load and tyre ratings

Trailer Tyre Load and Tyre Ratings

It is important to note that it is very dangerous to inflate a tyre beyond maximum pressure. The table shows load and tyre ratings covering the most common trailer tyre sizes.

Tyron safety bands

When replacing trailer tyres it is advisable to consider fitting Tyron safety bands. These are a simple but effective safety device which can be fitted by an etyres fitter. Tyron bands work by keeping the tyre on the wheel in the event of a puncture or blowout, which will allow you time to drive to a safe place and stop to change the wheel.

With a trailer which does not have them fitted could, a damaged tyre could come off the wheel rim, causing it to come into contact with the road and inflicting costly damage. The higher the speed you are travelling at when the blowout happens, the greater the chance of suffering an accident when a tyre becomes damaged.

Having Tyron safety bands fitted will give extra peace of mind with the knowledge that even if a puncture occurs or a tyre deflates, you will still be able to maintain control of your trailer.

Ordering trailer tyres

When replacing trailer tyres you can order online by entering your required size into the search tool at the top of the page. You can also call our National Sales Team on 0800 028 9000. They can offer advice on which trailer tyres are right for you and also advise on fitting Tyron safety bands.