I know a guy who prides himself in driving around with tyres that have visible cracks in the sidewalls, as if its a badge of honor to use tryes like this.
Thats because he lives in Tassie, and there is no manditory roadies. Even if the government says no manditory yearly full inspections, tyres and brakes should be checked
Brakes and tyres. They will save your life in an emergency braking situation. So i dont much with old tryes.