Chevrolet Equinox Service Manual: Tire Inspection Wheels

We recommend that the tires, including thespare tire, if the vehicle has one, be inspected for signs of wearor damage at least once a month.

Replace the tire if:

The indicators at three or more places aroundthe tire can be seen.There is cord or fabric showing through thetire's rubber.The tread or sidewall is cracked, cut, orsnagged deep enough to show cord or fabric.The tire has a bump, bulge, or split.The tire has a puncture, cut, or other damagethat cannot be repaired well because of the size or location of thedamage.