The red and yellow dots on new tires are small colored marks used by manufacturers to help technicians balance and mount the tire correctly on the wheel. They indicate specific points on the tire that should align with parts of the wheel (rim) to minimize vibration and improve balance.
🟡 Yellow Dot — Lightest Point of the Tire
- The yellow dot marks the lightest spot on the tire.
- When mounting, it should be aligned with the valve stem (which is usually the heaviest point on the wheel).
- This helps balance the tire-wheel assembly with less added weight.
🔴 Red Dot — Highest Point of Radial Runout
- The red dot indicates the highest point of the tire’s radial runout (slightly raised spot).
- It should be aligned with the lowest point on the wheel, which is often marked with a small dimple or dot on the rim.
- This helps reduce vertical vibration while driving.
⚙️ If Both Dots Are Present
- Follow the red dot and match it to the wheel’s low point mark.
- If the rim doesn’t have a low-point mark, align the yellow dot with the valve stem instead.
đźš— Why This Matters
Proper alignment:
- Reduces the amount of wheel balancing weights needed
- Improves ride smoothness
- Helps extend tire life
âś… Quick rule mechanics follow:
- Yellow → Valve stem
- Red → Wheel low-point mark
If you want, I can also explain other tire markings (like colored stripes or paint lines on the tread) that people often confuse with these dots.
