Estimate balance bead amount from tire weight, or find tire weight from bead weight, using pounds, kilograms, grams, ounces, or milligrams.
- Rollout Calculator
- Tire Pressure Temperature Calculator
- Ballast Weight Calculator
- Distance to Empty (DTE) Calculator
- Bead Calculator
- All Automotive Calculators
Balance Bead Formula
The calculator uses a rule-of-thumb ratio of about 1 ounce of balance beads for every 13 pounds of tire weight.
BB = TW / 13
TW = BB * 13
- BB = balance beads, in ounces
- TW = tire weight, in pounds
- 13 = rule-of-thumb pounds of tire weight per 1 ounce of beads
If you enter tire weight, the calculator converts that value to pounds, divides by 13, then converts the bead amount into your selected bead unit.
If you enter balance beads, the calculator converts that value to ounces, multiplies by 13, then converts the estimated tire weight into your selected tire weight unit.
Enter a value in exactly one field. If both fields are filled, or both are empty, the calculator cannot know which direction to solve.
Rule-of-Thumb Balance Bead Amounts
These values follow the same tire-weight-to-bead ratio used by the calculator.
| Tire Weight | Estimated Balance Beads | Estimated Balance Beads |
|---|---|---|
| 25 lb | 1.92 oz | 54.43 g |
| 40 lb | 3.08 oz | 87.18 g |
| 60 lb | 4.62 oz | 130.90 g |
| 80 lb | 6.15 oz | 174.27 g |
| 100 lb | 7.69 oz | 218.01 g |
Common Unit Conversions
| Quantity | Conversion |
|---|---|
| 1 lb | 16 oz or 0.453592 kg |
| 1 kg | 2.20462 lb |
| 1 oz | 28.3495 g |
| 1 g | 0.035274 oz |
Example Problems
Example 1: Estimate beads from tire weight
You have a tire that weighs 52 lb.
BB = 52 / 13 = 4
The estimated balance bead amount is 4 oz.
Example 2: Estimate tire weight from beads
You plan to use 6 oz of balance beads.
TW = 6 * 13 = 78
The estimated matching tire weight is 78 lb.
FAQ
Is this balance bead estimate exact?
No. This is a rule-of-thumb estimate based on tire weight. Actual bead amounts can vary by tire size, tire construction, wheel type, vehicle use, and the bead manufacturer’s recommendation.
Should you round the bead amount?
In practice, bead amounts are often rounded to a usable measurement, such as the nearest half ounce or full ounce. If you are following a specific product chart, use that chart over a general rule-of-thumb value.
Can too many balance beads cause a problem?
Yes. Using far more beads than needed can reduce how well they distribute inside the tire and may create vibration instead of correcting it. Use the estimate as a starting point, then compare it with the tire or bead manufacturer’s guidance.
