What should you check about tyres during a bus walk-around?

1. Treat surface cuts or bulges as workshop items when the measured tread and pressure are acceptable
2. Judge inflation from whether paired tyres look level, without checking for contact between them
3. Use the outward tyre face as representative when the inner faces of twin wheels are difficult to see
4. Check tread, inflation, damage, embedded objects and the security of wheels and their fixings