new front tyre - wheel wobble at 80mph

mattyprice4004

Netwizard wrote: »

But if the OP is having his wheels balanced in this country, they have to adhere to this countries rules and limits of course we all do over 70 on the motorway at some point but the tyre shops can still only balance to 70mph because this is the limit by law

Of course if your going somewhere with a more relaxed attitude to the speed limits than the uk, then get the tyres balanced there :T

No, they can balance to whatever speed they want if needed. Track cars etc will have them balanced for more than 70mph.

Just because that's the limit doesn't mean products and services are limited to 70mph.

So having a remap should be illegal as that'll take the car over 70mph, selling any car that'll do over 70mph should be illegal... come on

mcfisco

Netwizard wrote: »

But if the OP is having his wheels balanced in this country, they have to adhere to this countries rules and limits of course we all do over 70 on the motorway at some point but the tyre shops can still only balance to 70mph because this is the limit by law

Of course if your going somewhere with a more relaxed attitude to the speed limits than the uk, then get the tyres balanced there :T

Tyres are either balanced or not, speed is irrelevant, the balancer is merely looking for heavy spots on the wheel/tyre.
Where do you get the idea they're balanced up to 70mph?
I balance my motorcycle wheel/tyres in my workshop by hand and I certainly get nowhere near the rpm to equate to 70mph, they stay true up to top speed, 180 ish
I also do car wheel/tyres by hand, same as above, good for any speed.
My method is nowhere near as quick as the machines but apart from not doing a road force balance it's the same.

mcfisco

Just done some checking

The balance machines spin up to around 200rpm
A 245/75 R17 has a circumference [new] of around 100"
63360 inches in a mile
Therefore ((200x100)x60)/63360 = 18.9mph

Joe_Horner

mcfisco wrote: »

Tyres are either balanced or not, speed is irrelevant, the balancer is merely looking for heavy spots on the wheel/tyre.
Where do you get the idea they're balanced up to 70mph?

people seem to get confused because out-of-balance will usually be most obvious as vibration at certain speeds, so they assume it's speed related. In fact, as you say, they're either balanced or not.

If they're not balanced then at certain speeds the frequency of vibration resonates with the suspension and you feel it, at other speeds the suspension successfully damps the vibration. The out of balance is still there at those other speeds, but you don't feel it (unless it's very bad!)

jase1

Netwizard wrote: »

But if the OP is having his wheels balanced in this country, they have to adhere to this countries rules and limits of course we all do over 70 on the motorway at some point but the tyre shops can still only balance to 70mph because this is the limit by law

Hmmm.

If that's the case, how come I have to buy at least H-rated tyres for my car (130mph)?

I can only ever do 70, so why can't I legally drive on N-rated tyres for instance?

jase1

Joe_Horner wrote: »

people seem to get confused because out-of-balance will usually be most obvious as vibration at certain speeds, so they assume it's speed related. In fact, as you say, they're either balanced or not.

If they're not balanced then at certain speeds the frequency of vibration resonates with the suspension and you feel it, at other speeds the suspension successfully damps the vibration. The out of balance is still there at those other speeds, but you don't feel it (unless it's very bad!)

Indeed -- and of course if you go faster than the resonance frequency, the vibration will usually go away. So maybe the OP should try that?

andygb

As in post#6 I would double check the wheel nuts first, then grab the weels and try to shake them to see if there is any movement.
Were the old tyres worn down in one place - inner or outer walls /edge of tread, because putting new tyres on with the tracking out will feel horrible.
Do the mobile fitters have decent tyre balancing kit?

[Deleted User]

andygb wrote: »

As in post#6 I would double check the wheel nuts first, then grab the weels and try to shake them to see if there is any movement.
Were the old tyres worn down in one place - inner or outer walls /edge of tread, because putting new tyres on with the tracking out will feel horrible.hecDo the mobile fitters have decent tyre balancing kit?

Yes old tyres were worn on the edge so I was going to get tracking checked as well and two new tyres on friday.

Like I said, I'm away from home working and puncture forced the issued somewhat. Done by mobile guy with manky looking balancing machine in back of van.

I'll take it somewhere local on friday and get balancing and tracking checked.

Netwizard

Where do you get the idea they're balanced up to 70mph?
I balance my motorcycle wheel/tyres in my workshop by hand and I certainly get nowhere near the rpm to equate to 70mph, they stay true up to top speed, 180 ish
I also do car wheel/tyres by hand, same as above, good for any speed.
My method is nowhere near as quick as the machines but apart from not doing a road force balance it's the same.

Friend of mine used to work for the local tyre fitters. Family run business so none of this rubbish franchise place.

We had wheel balancing issues on our Jeep also at 80mph. We have had to put up with it - especially annoying as we have just come back from france, where the motorway speed limit is 80.

Im just going by what I have been told by my friend and his boss. Ive also tried some other tyre places in the local area. All of them told me the same.

If I have been misinformed, I apologise, and if anyone knows where I can get the wheels balanced at 80mph around Stoke, it would be appriciated.

[Deleted User]

mcfisco wrote: »

Just done some checking

The balance machines spin up to around 200rpm
A 245/75 R17 has a circumference [new] of around 100"
63360 inches in a mile
Therefore ((200x100)x60)/63360 = 18.9mph

Interesting. So basically the machine just assists in balancing them - either they are or are not.