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Do Semi Slicks Need To Be Balanced?

DJBarnstar
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hrd-hr30 Grand Master

hrd-hr30

Posted
Posted (edited)

Even so, that's no reason not to balance as far as I can see.

Start with unbalanced wheels and you might get one that's 130g out like mine. That would definitely be noticeable on the front of a car.

If you balance it with 130g of weight, when it moves it might go out of balance a bit. It may or may not be noticeable, but it's definitely not going to be as bad as 130g out of whack.

Edited by hrd-hr30
Marlin Grand Master

Marlin

Posted
Posted (edited)

Even so, that's no reason not to balance as far as I can see.

Start with unbalanced wheels and you might get one that's 130g out like mine. That would definitely be noticeable on the front of a car.

If you balance it with 130g of weight, when it moves it might go out of balance a bit. It may or may not be noticeable, but it's definitely not going to be as bad as 130g out of whack.

I definately hear your side of the discussion mate.

I've just never had the need to.

I dunno, maybe just a long run of luck with the Yoki and Dunlop semis that I/we have used? Remember I did say that the more road biased Kuhmos I've used definately needed balancing.

Edited by Marlin
  • 4 weeks later...
hrd-hr30 Grand Master

hrd-hr30

Posted
Posted (edited)

bit of a strange result from Lakeside yesterday. Powerhouse 120Y with old school SOHC L20B from an 83 Bluebird with a carby turbo setup running 7psi, so it's no powerhouse. Has S13 front discs (and lovely stock 120Y rear drums lol) and definitely brakes alot harder than it accelerates!

I marked the tyres to see what would happen and the only tyre that moved at all was the left rear. The fronts, which I figured would be most likely to move didn't budge one iota. Just the left rear, and it moved quite a bit. And it has bugger all power!

Tyres were just fitted the day before. Used lube but a very small amount and only on the base of the outer bead

post-15659-0-42582200-1429750223_thumb.jpg

Edited by hrd-hr30
2pee Enthusiast

2pee

Posted
Posted

Ron Tauranac was big on dynamic and static balancing - and fastidious on runout to avoid exciting the tyres in his formula days. All the manufacturer's dealers trackside support balances as part of the service, so might as go with what they do.

In the old motorcycle days and particularly mud races > very low pressures, pk screws were often run into the bead through the rim......which would make a nice industrial look on a car!

  • 2 weeks later...
burn4005 Proficient

burn4005

Posted
Posted (edited)

Beware of using stick on weights on the track. In my experience the wheel gets so hot the glue melts and the weights fall off in the pits. Although that was on a 400kw car on stock brakes at QR....

I put that metallic air con duct tape over them and now they stay where they should. Maybe my tyre place uses cheap shitty weights.

Edited by burn4005

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