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Mercedes - Wheel balancing question - js123

I recently had 2 new tyres fitted to my van. The new tyres had a little yellow circle printed on the sidewall and this was aligned next to the valve. I believe this is to match the lightest part of the tyre (yellow circle) with the heaviest part of the rim (valve) which will help to balance the wheel.

During balancing 80g of weights were added exactly next to the valve. Some, or all, of these weights will be there to compensate for the adjacent lightest part of the tyre. If the tyre was deflated and rotated 180 degrees on the rim the amount of weights would be reduced or maybe there would be no weights needed.

If I had a balancing machine and was doing this job at home then this is what I would do - rotate the tyre on the rim to eliminate the need to add weights next to the lightest part of the tyre. I think this would be doing the job correctly.

The tyre fitter has not done this so I have a wheel with possibly 3 unnecessary weights on it.

Has he done a good job?

Mercedes - Wheel balancing question - elekie&a/c doctor
What make tyres have been fitted?
Mercedes - Wheel balancing question - js123

Not sure of the relevance of your question but they are toyo.

Mercedes - Wheel balancing question - Andrew-T

Has he done a good job?

If your wheel has been balanced both radially and transversely (so that the balancer shows 0 out-of-balance) he has, and there should be no detectable vibration at 50-60 mph. If you are saying that balancing might have been possible using fewer weights, then it might, but the fitter is unlikely to want to depressurise the tyre and search for a better position.

Not many new tyres will come with perfect balance, and in the overall mass of an alloy wheel plus tyre, 80 grams is not a big deal. The only snag may be if so many weights are needed that they risk fouling the hub or braking system.

Mercedes - Wheel balancing question - js123

Thanks for your reply.

This was the second time I had returned to this tyre shop as the first time they had incorrectly used 2 different types of weights - ones for alloy and ones for steel wheels. I could also see that with weights fitted in multiple places all around the wheel that they didn't know what they were doing. It was balanced 0-0 but it was not a good job done.

Mercedes - Wheel balancing question - Andrew-T

It was balanced 0-0 but it was not a good job done.

I always have vague doubts about the centrality of the adapters added to the spindle of a balancer, plus the accuracy of attaching the wheel to be balanced. But it's not unusual to see how non-circular a tyre can appear while being spun.

Edited by Andrew-T on 06/05/2022 at 12:37

Mercedes - Wheel balancing question - Bolt

Thanks for your reply.

This was the second time I had returned to this tyre shop as the first time they had incorrectly used 2 different types of weights - ones for alloy and ones for steel wheels. I could also see that with weights fitted in multiple places all around the wheel that they didn't know what they were doing. It was balanced 0-0 but it was not a good job done.

they do if the balance is a long way out as too many stick on weights could cause some to fall off which used to happen in a small area, so they fit steel wheel rim weights usually fitted to the inner rim so you don`t see it, but it does the same job without the problems of fitting or sticking weights all in the same area

not sure what you mean by not a good job, as weights are as good as it gets looks wise and have to be fitted as machine tells you to fit, otherwise you chase the imbalance around the wheel, been there done it...

Mercedes - Wheel balancing question - js123

Thanks for your reply.

My wheels are steel. The weights used were the hammer on type but for alloy wheels. The second fitter confirmed that they were the wrong weights.

Yes, the first guy had been chasing weights and making a mess of it. The weight positioning was completely different on the second balance.

Mercedes - Wheel balancing question - Bolt

Thanks for your reply.

My wheels are steel. The weights used were the hammer on type but for alloy wheels. The second fitter confirmed that they were the wrong weights.

Yes, the first guy had been chasing weights and making a mess of it. The weight positioning was completely different on the second balance.

May have been a learner not realising the different rim shapes of the weights, not many garages separate them to make it easier on the fitter- or others mix them all up because the speed they work, at least its sorted now, thanks for the update...