Tyre balancing error?

Jim79

I got 2 new rear tyres for BMW 5 series F10. They removed all of the old weights and put on 20 weights on the alloy one side and 3 on the other.

The following morning the first right hand bend i met i suddenly felt a sensation of lateral movement. I felt it multiple signs since. I have little confidence in the car in the bends at the moment. I will go back and ask the fitters. But what do you think is there a tyre balancing error?

landmarkjohn

Check your wheel nuts are tight and if all OK bring back to get balanced again. Weights can fall off. And sometimes the fitters just don't balance them properly.

It's not your imagination, it happens often when replacing tyres.

Whocare

Could it be because of cheaper tyres with little grip

Beltby

Tyres are made in a mould. There is a certain amount of lube used so the rubber doesn't stick to the mould. Some of it remains on the tyres. Typically you would do around 200 miles before the lube is worn off and the tyres have full grip.

Stoolbend

Did you put non run flat tyres on the rear with run flats on the front?

What brand are the tyres?

Toyotafanboi

Each wheel and tyre will have a different quantity of weights, depending on the tyre mould and condition of the rim. Cheaper tyres in my experience generally seem to need more effort to balance than premium tyres.

What tyres did you get fitted?

Jim79

Nankang tyres (mid range) run flat

corkgsxr

Jim79 wrote: »

Nankang tyres (mid range) run flat

What had you previously out of curiosity

Jim79

corkgsxr wrote: »

What had you previously out of curiosity

Pirelli, they were well worn when they came off.

corkgsxr

Jim79 wrote: »

Pirelli, they were well worn when they came off.

There's your issue so. You took off a premium tire and went cheap. They were never going to grip as well

mickdw

Jim79 wrote: »

Pirelli, they were well worn when they came off.

What you are feeling is the cheap tyre sliding on the rear. Id driven nankangs and found them poor in the wet. Cerainly not a tyre for the rear of a 5 series.
Balancing or lack of will cause a shiver at speed.

Ive a feeling you will be swapping out those tyres again.

Neilw

Jim79 wrote: »

Nankang tyres (mid range) run flat

It's sad when nankangs, ditch finders themselves are classed as mid range tyres.

OP, cough up and put some decent tyres on your car.

landmarkjohn

I've been running Nankang NS20 for years and find them fine, a good balance between price, longevity and grip. And that's on a 258 BHP BMW, but I'm not a sporty driver.

I would consider them a mid range tyre. I selected them because I thought the tread pattern looked close to the OE Bridgestone.

tcawley29

Jim79 wrote: »

Nankang tyres (mid range) run flat

They are absolutely not a mid range tyre

corkgsxr

landmarkjohn wrote: »

I've been running Nankang NS20 for years and find them fine, a good balance between price, longevity and grip. And that's on a 258 BHP BMW, but I'm not a sporty driver.

I would consider them a mid range tyre. I selected them because I thought the tread pattern looked close to the OE Bridgestone.

You could have a tread pattern that perfectly matches Bridgestones and proform completely different.

Compound makes massive difference.

Eg on big bike wets are mega threaded, slicks don't work at all.
Small bikes the wets are slicks and work astoundingly well

Difference is compound

9935452

Jim79 wrote: »

I got 2 new rear tyres for BMW 5 series F10. They removed all of the old weights and put on 20 weights on the alloy one side and 3 on the other.

The following morning the first right hand bend i met i suddenly felt a sensation of lateral movement. I felt it multiple signs since. I have little confidence in the car in the bends at the moment. I will go back and ask the fitters. But what do you think is there a tyre balancing error?

Were you driving the car hard and was the road wet.
As one of the other posters suggested id check the wheel nuts are tight and all tge tyre pressures correct
Normally badly balanced tyres cause a shaking or vibration when you are driving .

What make tyres are on the front ?
Saying nankangs are a good midrange tyre is a bit of a stretch imo.
Especially if you have a good tyre on the front.
The balance isny correct

Jim79

The road was dry and i was not driving hard but a small bit quick into that bend. i have since checked the pressures and wheel nuts. there was a 4 psi difference between the 2 tyres.

Goodyear on the front. I didn't say nankang are a good midrange just when i searched on the net sources tell me that they are mid range. For example https://www.tyrereviews.co.uk/Tyre/.

On the day i got the tyres i went to my local fitter asked for pirelli and he said he was out but had Nankang and told me that they were a sound tyre and i said OK. also there is nothing budget about the run flat tyre price.

I am going back tomorrow to the fitter

Whocare

Jim79 wrote: »

The road was dry and i was not driving hard but a small bit quick into that bend. i have since checked the pressures and wheel nuts. there was a 4 psi difference between the 2 tyres.

Goodyear on the front. I didn't say nankang are a good midrange just when i searched on the net sources tell me that they are mid range. For example https://www.tyrereviews.co.uk/Tyre/.

On the day i got the tyres i went to my local fitter asked for pirelli and he said he was out but had Nankang and told me that they were a sound tyre and i said OK. also there is nothing budget about the run flat tyre price.

I am going back tomorrow to the fitter

How did you get on

mickdw

You go in looking for 2 pireillis and he sells 2 nankangs.
The mind boggles.

Ive run nankangs before. Didnt find them good in the wet but apart from that, i found that I got very poor mileage out of them so didnt make sense at all.

Whocare

mickdw wrote: »

You go in looking for 2 pireillis and he sells 2 nankangs.
The mind boggles.

Ive run nankangs before. Didnt find them good in the wet but apart from that, i found that I got very poor mileage out of them so didnt make sense at all.

Tyre places love selling cheap Chinese tyres must have a bigger profit out of them. When I when to fitter few months ago he had a hard on trying to sell me some cheap tyres I kept saying no I find Firestone a good tyres in end he said ok but these Chinese tyres are every bit as good he kept saying in end said he can have Firestone next day in stock (as he had to order them in