Wheel Balancing and weights

Moanin

Hi,

Wondering if anybody can enlighten me on weights used when balancing wheels?

I got 2 new tyres on front of car a few weeks ago and noticed a slight vibration in the car when driving at 80kmph + (not through the steering wheel but in the front area of the car)

I had a look at the weights on the 2 front wheels and there’s a different amount of weight on each wheel.

should they both have the same weight on each wheel?

Thanks

mk7r

No, they are balanced individually

Moanin

Why is that though if both wheels are the same with new tyres just fitted.

Would both wheels be different weights before balancing?

Thanks

sundodger5

Because the wheels may not be perfectly round and the tyres would have heavier spots due to the way they are manufactured.

As an aside it sounds like they need rebalancing though.

Moanin

Thanks for that.

Good to know.

Im going back to tyre shop tomorrow

bazz26

What brand tyre are they? It's not unheard of for cheap unknonw branded tyres to cause that too.

Moanin

Davanti. I’ve been using them previously on A6 and have found them excellent.

I’m going to get tyre shop to recheck balancing and if it’s okay I’ll ask them to replace tyres.

sundodger5

Brand should not affect the balancing or the ability to balance them. Some alloy wheels due to the design make them a bit more difficult to balance though.

standardg60

Did you check the nuts were tight?

Moanin

Yip

Neilw

https://www.boards.ie/discussion/comment/120318440#Comment_120318440

Shouldn’t but sometimes it does, saw it first hand, cheap tyres on new wheels wouldn’t balance. Switched to a premium brand and they balanced with minimal weights.

Buffman

That probably comes down to if the manufacturer bothered to mark the tyres with yellow(lightest point) or red (highest point) dots for the fitter to be able to line them up appropriately and make them as 'naturally' ballanced as possible. (light point of tyre opposite heavy point of wheel (valve) or high point of tyre opposite low point of wheel)

If the tyre's not marked, it's pot luck when fitting and if unlucky can end up way off balance and need a lot of adjustments.

kirving

I've had a buckled alloy causing vibration before. The tyre fitter just added a ton of weight so it read as "balanced" on his machine, but the car still vibrated when driving. The reputable place I took it to afterward saw the buckle immediately and advised me (for free) to fix it.

https://www.boards.ie/discussion/comment/120315690#Comment_120315690

The wheel should still be round, the vibration of a wheel (without tyre) would be more to do with how it cooled in a mould and became more or less dense in parts.