Steel clip on wheel weights
You knock steel wheel weights onto the rim edge of a steel rim with a hammer. They stay put under changing load and can be reused. You pick the weight in grams that your balancer shows, and the size that fits the rim edge. For light rims you use alloy wheel weights. The full range of knock-on and adhesive weights sits under knock-on weights.
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Steel wheel weights: size, weight and fitting
Which size fits your rim edge
A steel wheel weight grips over the rim edge with a lip. That lip has to follow the thickness of the edge. Measure the edge where the weight will sit and pick the matching size. A lip that is too wide sits loose and shifts, one that is too tight you will not get on properly with any hammer. If you are unsure between two sizes, take the size you can feel gripping the edge by hand.
The weight in grams
Your balancer gives the correction per wheel in grams, left and right separately. Steel weights come per piece or per set, in steps of 5 grams. Knock the weight on at the spot the machine points to, not at a random spot on the edge. Several small weights next to each other work just as well as one heavy weight, as long as the total is right.
When you replace a weight
When you change a tyre, check the weights already on the rim. A weight that has shifted, or whose lip has been bent open, comes off and you knock a new weight on in the right place. Lost weights cause vibration in the steering at speed on the road. Never knock a new weight on top of an old one: loosen the old one first.
Steel or alloy rims
Steel weights belong on steel rims. On an alloy rim the lip damages the edge, and there you use alloy wheel weights, which you stick on. If you are not sure which type you need, look at the rim first and not at the balancer. For the complete overview of knock-on and adhesive weights, go to knock-on weights.