The first sign to check is tread depth. Your tire treads need to be at least 1.6 millimeters deep. Use a gauge to measure the depth of the treads to know when to replace. Tires with no treads do not drive well on slippery grounds. They are also more prone to bursting. You can also use the tread wear indicator bar on most modern tires.
Cracks and blisters on the sides of the tires are also obvious signs of damage. These are common signs of weathering, and they also increase the chances of tire bursting out. Cuts and items embedded into the tires are also obvious signs you need new tires. Allow your mechanic to assess the severity of the damages to see whether a replacement is needed immediately.
If your vehicle shows all these signs, the tire monitoring light will come on. If this light stays on after you inflate the tires or keep coming back on, you need to replace the tires.
