Buses are considered as heavy goods vehicles by tyre manufacturers, but bus tyres are not identical to lorry tyres. It's true that bus tyres require more resistant sidewalls because of regular impacts with the kerb.
Michelin manufactures wide bus tyres, eliminating the need for twin tyres. This type of tyre increases the space between the rear wheels, improves the flow inside the bus, and reduces fuel consumption.
Construction tyres are very special, they come in large dimensions and feature extraordinary resistance. Cement mixers, mechanical diggers and bulldozers are really heavy machines that have to carry huge loads. The burden is transmitted to the tyres.
Trailer tyres/drive axles/front axles
For trailer tyres, drive axle tyres or front axles, there are certain rules that must be respected.
On the same axle, it's illegal to mix:
- Different brands
- Different dimensions
- Different tyre categories (i.e. one summer and one winter tyre)
- Different load and speed index.
The life cycle of a lorry tyre is often:
- New tyre
In general, if you respect all these steps throughout the tyre's life cycle, you can double its initial life expectancy (125,000 miles).