Balancing The Tires - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 02-22-2005, 09:21 PM
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So i went to Merchant's tire center to balance my new tires and they put the weights on the outter side of my rim. I got 1999 528i with sport package, and my friend as well as few other people told me that you actually have to go to bmw dealership because the weights that are used should be placed somewhere on the inside used where on the inside - i dunno... well yeah, so should i go to merchant's and get my money back? or is it alright if the weights are on the outside?


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#2 (permalink) Old 02-23-2005, 04:22 AM
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Originally posted by superdeadman@Feb 23 2005, 04:21 AM
So i went to Merchant's tire center to balance my new tires and they put the weights on the outter side of my rim. I got 1999 528i with sport package, and my friend as well as few other people told me that you actually have to go to bmw dealership because the weights that are used should be placed somewhere on the inside* used* where on the inside - i dunno... well yeah, so should i go to merchant's and get my money back? or is it alright if the weights are on the outside?
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You see this is how BMW make so much money - Myths and legend such as "you have to have your tyres balanced at a BMW dealer". I'm not knocking you personally, but this is about as true as saying I'm the Queen of England.

OK here's the low down. When balancing a tyre the rim/tyre is spun on a machine that determines how much wobble (in basic terms) is present (as a disc very seldom spins perfectly) and advises the operator on how to correct this wobble by attatching weights to the inner AND outer edge of the rim, including the weight required and it's required position on the rim. However, without going into the laws of physics a clever tyre fitter will be able to cheat here and using his knowledge move weights around the rim, or, from the inner rim and outer rim to gain the same effect.

What I mean is, if a wheel machine says 15 grams is required on the inner rim and 5 on the outer rim, a good tech will be able to place 20gram on the inner rim and find the sweet spot which eliminates the wobble in exactly the same way as the 15/5 gram combo.

In short ANY tyre fitter should be able to balance ANY tyre on the inside only. And if he really respects your wheels he will use the stick on weights instead of the hammer on ones too. Most though, just want to do a quick job and won't do this unless you ask them to.


(Yep I briefly worked as a tyre fitter)
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#3 (permalink) Old 02-23-2005, 11:45 AM
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I just bot a 2001 525i and I saw the weights on the outside of my rims as well... I asked the dealer and he told me that the tires were just balanced by a "qualified BNW" technician... I said ok and left it at that but it sounds like beezelbub knows what he's talking about. Consequently I am going to take my wheels to someone else and have them rebalanced with the weights on the inside..
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#4 (permalink) Old 02-23-2005, 09:17 PM
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A friend of mine runs a tire shop as well. I know every time I have purchased rims, tires, rotation or whatever, he has always use the stick on type weights on any aftermarket rim I have. And/or uses the "hammer-on" style on the rear only. If the rims are polished/chrome in anyway, shape, or form, I would have them clean the wheel REALLY good (for good adhesion) and rebalance them with the stick-on style. BeelZibub is right on they should be able to fudge one way or the other or a combination and get it really close to true.

I am sure the "BMW technicians" guy doesnt care about the cosmetics, rather he is interested in making them as true as possible, regardless of looks.



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#5 (permalink) Old 02-23-2005, 11:30 PM
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Well, the mechanic did use the stick on weight so i can't complain there. So, from what i understand, it doesn't matter much where the weights will be, and that BMW dudes think it's cool to have the weights on the inside and make it seem like all the bimmers are flawless and do not need their tires to be balanced?
if that's the case, than i save like 70% off of bmw's price


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#6 (permalink) Old 02-24-2005, 01:35 AM
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It's not just BMW's, almost all cars with nice wheels now have their weights on the inside. I believe it's purely for aesthetic reasons. Like BeelZ said, wheels can be balanced with weights on the inside or out. I think it would be just common sense for the tire guy not to put any weights on the outside of a nice smooth wheel!

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#7 (permalink) Old 02-24-2005, 03:28 AM
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Originally posted by CosmosBlack@Feb 24 2005, 08:35 AM
It's not just BMW's, almost all cars with nice wheels now have their weights on the inside. I believe it's purely for aesthetic reasons. Like BeelZ said, wheels can be balanced with weights on the inside or out. I think it would be just common sense for the tire guy not to put any weights on the outside of a nice smooth wheel!
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Yep why pay $1500 for a nice set of flash rims to have bloody great weights hanging off the edges!
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#8 (permalink) Old 02-24-2005, 04:02 PM
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haha, i feel you there BeelZibub!
i got sports package, hence 17in smooth looking rims... and yeah, weight are on the outside so the rims aren't slick no more


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#9 (permalink) Old 02-26-2005, 08:39 AM
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[attachmentid=18860]

Take a look here and please tell me where a tire fitter can place a weight ANYWHERE on the “outside” of this wheel (left side of picture) -stick-on or sledge hammered!! It has to be on the “inside” and the inside only. Compare it with the tire on the right side of pic. which is my stock 15”. Yes it will take the weights on its outer edge. This 17” has no vacancy to accommodate any lead on the outside?
As Beelz said (didn’t know u were a tire fitter-briefly that is) two factors come into play here. 1. The Balancing Machine itself and 2.The skills under the belt of the machine operator. A quick look:
1. The old balance machines were designed for older steel wheels. They had settings for the width of the wheel and assumed hammered weights on the edges. Some had other options like balancing the mag wheels if u old enough to remember those. As such even after feeding the machine with all relevant data about the wheel; its calculated weight will be based on an entirely different wheel; because it assumes sledge-hammered weight for steel wheels. Thus feeding the machine with the proper input is a must. To do so it will take someone who knows his stuff….not Harry’s Taxi and $5 balancing services.
2. When I took those 17” for balancing I couldn’t help it but to stand next to the fitter to see how he does it. He had a modern machine which allowed him to input "a priori" his preferred location of the weight. Then he went on to split the heavy long weights while explaining, to me, the aftermath effect of weight cosmetics and glue separation. He charged $25 per wheel…I was impressed.
Note: I did not say dealer or independent tech….simply a good one…..
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#10 (permalink) Old 02-28-2005, 01:10 PM
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these are the rims i got. you can put the weights on the outside.
As far as the person charging you 25 bucks/wheel, i think that's the price the dealership asks.
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