Tire Valve Maintenance, Inspection, and Replacement Recommendations

**Replacement Interval**

**General Recommendation:** The rubber components of a tire valve typically age over a period of **3 to 4 years**; it is recommended that they be replaced concurrently with the tires.

**Mandatory Replacement Scenarios:** Whenever new tires are installed, it is strongly recommended to replace the valve stems at the same time. This is because old valve stems may deteriorate prematurely during the lifespan of the new tires, potentially leading to slow air leaks.

**Assessing for Aging**

**Visual Inspection:** Gently flex the base of the valve stem (near the rim) with your finger to check for any signs of cracks, discoloration, or hardening.

**Leak Detection:**

**Water Immersion Method:** Submerge the valve stem in water or apply soapy water to it, and observe whether a continuous stream of bubbles appears.

**Segmented Troubleshooting:** If a leak is suspected, first inspect the area immediately surrounding the valve stem. If no bubbles are observed there, unscrew the valve cap and spray water directly onto the valve core to test it. If bubbles appear, attempt to tighten the valve core; if the leak persists, the valve core—or the entire valve stem—must be replaced.