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Discussion Starter #1
Whats a normal amount of wheel weight to get a balanced wheel. Went to the dealer with 20G in the rear and 10G in the front on a forged Marchesini wheel and Pirelle SuperCorsas Tires. Replaced with same type of tire and came out with no weights in the front and 80G in the rear. Is that normal? Still have to mount on bike and test but Im just curious why so much weight in the rear to balance. Red dots are lined up with the valve stem.
 

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Whats a normal amount of wheel weight to get a balanced wheel. Went to the dealer with 20G in the rear and 10G in the front on a forged Marchesini wheel and Pirelle SuperCorsas Tires. Replaced with same type of tire and came out with no weights in the front and 80G in the rear. Is that normal? Still have to mount on bike and test but Im just curious why so much weight in the rear to balance. Red dots are lined up with the valve stem.
Each wheel is unique.
Each tire is unique.
Depending on exactly *where* the tire is mounted (down to the mm) it will effect how much weight (if any) you need in order to balance it.

I wouldn't worry about it at all, but I cannot speak to the "average" amount of weight that is needed, not sure of the #
 

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The red dot on tires indicate the lightest point.

Before mounting a new tire, you should determine the 'true' heavy spot on the wheel. It's not necessarily next to the tire valve. Just place the wheel (only) on the balancer first and mark the rim's heavy spot with permanent ink. Then align the tire's dot with your wheel's new mark. You can also mark the inside of the rims to eliminate the need to balance them in the future. Note the directional arrow.
 

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This is true. Most of our bikes come standard with lightweight alloy valve stems as well, which negates that imbalance a little.

The lighter forged/machined wheels are usually pretty good in terms of weight balance, but the cast wheels can be out a bit in the way Shazaam describes.

I had a rear wheel on a '90s SS which had a heavy spot away from the valve. If you find and mark that point and move the tyre spot there you can save on wheel weights.

Of course this imbalance is often a function of the tyre manufacture, and some makers are worse in this respect than others. Tyres are not all created equal in terms of both balance and running true..

But I don't like having as much as 50g in weights on there, particularly after spending so much effort and $$ on lightening every fucking thing on the wheels..

:D
 

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Discussion Starter #5
Contacted Pirelli and they indicated 80g is the max allowed before a warranty claim can be put in. Going back to the dealer to have the tire rotated on the rim and the rim checked for balance. Thanks for the responses guys.

Sent from my SM-N900V using Ducati.org Forum mobile app
 

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Good move. 80g on a forged rim with a Pirelli is definitely unusual.
I just put the 24th rear tyre on my 1098S, and I don't think I've ever needed more than about 25g on any of them.
 
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