Free Engineering Tool
Wheel Balancing Weights Calculator
Calculate the required balancing weight for vehicle wheels. Enter measured unbalance and rim diameter to find the correct clip-on or adhesive weight.
Results
Correction Weight Formula
The correction mass is determined from the measured unbalance and the correction radius (distance from the wheel center to the weight placement):
- mcorrection — required weight (grams)
- U — measured unbalance (g·mm)
- R — correction radius (mm)
Correction Radius from Rim Diameter
The correction radius is approximated as half the rim diameter converted to millimeters:
This assumes the weight is placed at the rim edge (flange). For adhesive weights placed further inboard, the effective radius may be smaller.
Standard Weight Increments
Wheel balancing weights come in standard 5 g increments. The calculated weight is rounded to the nearest available size:
| Standard Weights (grams) |
|---|
| 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60 |
Weight Types
| Type | Material | Typical Use |
|---|---|---|
| Clip-on steel | Steel | Steel wheels, some alloy rims with flanges |
| Clip-on zinc | Zinc alloy | Steel/alloy wheels, lead-free alternative |
| Adhesive steel | Steel | Alloy wheels, hidden placement inside barrel |
| Adhesive zinc | Zinc alloy | Alloy wheels, lead-free, hidden placement |
| Lead clip-on | Lead | Legacy / classic vehicles (being phased out) |
Practical Example
Given: Measured unbalance = 1500 g·mm, Rim diameter = 17″
R = 17 × 25.4 / 2 = 215.9 mm
m = 1500 / 215.9 = 6.95 g
Nearest standard weight: 5 g (round down) or 10 g (round up)
Best match (nearest): 5 g
⚠️ Note: Adhesive weights placed inside the rim barrel have a slightly smaller correction radius than clip-on weights at the flange. For precision, measure the actual placement radius. This calculator uses the rim edge as an approximation.
Wheel balancing compensates for uneven mass distribution in a tire-wheel assembly. A balancing machine spins the wheel at high speed and uses sensors to measure the unbalance magnitude and angle at each correction plane.
Weights are then placed at specific locations on the rim to counteract the heavy spot. This reduces vibration transmitted to the steering wheel and vehicle body at highway speeds.
Clip-on weights attach to the outer rim flange using a spring-steel clip. They are mainly used on steel wheels and some OEM alloy wheels with suitable flanges.
Adhesive (stick-on) weights use a peel-and-stick tape backing and are placed on the inside of the rim barrel. They are preferred for alloy wheels because:
- No visible weights on the outside
- No risk of scratching or damaging the rim finish
- Better aesthetic appearance
For passenger cars, residual unbalance below 5 g per plane is generally acceptable. Most modern wheel balancing machines resolve to 1–5 g.
Unbalance above 10–15 g per plane usually causes noticeable steering vibration at highway speeds (80–120 km/h / 50–75 mph). Heavy trucks and commercial vehicles have higher tolerances due to larger tire mass.
A wheel can have two types of unbalance:
- Static unbalance — heavy spot in one plane, causes up-and-down vibration
- Dynamic (couple) unbalance — offset heavy spots in different planes, causes side-to-side wobble
Two-plane (dynamic) balancing corrects both components simultaneously. Single-plane correction only handles static unbalance and may leave a residual couple.
Static balancing corrects unbalance in one plane only. The wheel's center of gravity is moved back to the rotation axis. This is simpler but incomplete for wide wheels.
Dynamic balancing uses two correction planes (inner and outer) to eliminate both the force unbalance and the couple unbalance. This is the standard method for all modern passenger vehicles and provides the smoothest ride.
The procedures described on this page were developed and field-tested by the Vibromera team using the Balanset-1A, a portable dual-channel balancer and vibration analyzer for on-site rotor balancing.
Professional field balancing instruments and software. Achieve precise wheel and rotor balancing on-site. Used in 50+ countries.
Nikolai Shelkovenko
Nikolai Shelkovenko is a vibration analysis engineer and the founder and CEO of Vibromera. For more than 15 years he has balanced rotating equipment in the field rather than on a test bench: mulchers, industrial fans, crushers, centrifuges, shafts and spindles. That work is what the Balanset instruments grew out of — they were designed as a tool a specialist can carry to the machine and use alone, on site, not as laboratory equipment. Vibromera was founded in 2017 and has been based in Porto, Portugal, since 2023. Development, assembly and support of the Balanset line all happen here. The flagship instrument is the Balanset-1A, a portable analyser for single- and two-plane balancing and for vibration diagnostics. Nikolai is personally involved in customer support, in working through difficult balancing cases and in the development of the software. He works with customers worldwide, in any language.
