[snj1013]

Originally Posted by twaiter

hi guys

just a quick message as i seen your posts on the road force issues and as i am having the same issues as everyone else i thought i would message for help.

ive had my wheels done on road force but ive no idea on the settings they have used, i have been told its balanced up fine but needing like 70g of weights on the wheels.

could you give me some information to what i should be asking for or checking?
i appreciate your help.

Martyn

PM Sent

[twaiter]

So im still having issues.

Ive had my rear tyres changed from runflat to non runflat.
the place has used the newest hunter kit but the RF is at 40 and 45nm .
this is the only place in my country who has this kit and not matter how much i have asked if they can reduce it they say that if the machine said its perfect then its perfect.
i then argued that the road force value could be minimized and they said they dont have a feature of getting it to set lower.

i seen the screen when it was done and the tyre didnt have any defects or anything.

Im told my front control arms need changed and they wont entertain it until this is done to prove its not the culprit but i explained its only gotten a bit worse since the tyre change.

i explained the car is sensitive etc and i just want the RF lower but they wont entertain it as soon as its in the green.

anything you can suggest?

[snj1013]

Originally Posted by twaiter

So im still having issues.

Ive had my rear tyres changed from runflat to non runflat.
the place has used the newest hunter kit but the RF is at 40 and 45nm .
this is the only place in my country who has this kit and not matter how much i have asked if they can reduce it they say that if the machine said its perfect then its perfect.
i then argued that the road force value could be minimized and they said they dont have a feature of getting it to set lower.

i seen the screen when it was done and the tyre didnt have any defects or anything.

Im told my front control arms need changed and they wont entertain it until this is done to prove its not the culprit but i explained its only gotten a bit worse since the tyre change.

i explained the car is sensitive etc and i just want the RF lower but they wont entertain it as soon as its in the green.

anything you can suggest?

Not sure why they are giving Road Force values in Nm (this is torque, not force in pounds). PM sent.

[jarnold517]

Originally Posted by twaiter

So im still having issues.

Ive had my rear tyres changed from runflat to non runflat.
the place has used the newest hunter kit but the RF is at 40 and 45nm .
this is the only place in my country who has this kit and not matter how much i have asked if they can reduce it they say that if the machine said its perfect then its perfect.
i then argued that the road force value could be minimized and they said they dont have a feature of getting it to set lower.

i seen the screen when it was done and the tyre didnt have any defects or anything.

Im told my front control arms need changed and they wont entertain it until this is done to prove its not the culprit but i explained its only gotten a bit worse since the tyre change.

i explained the car is sensitive etc and i just want the RF lower but they wont entertain it as soon as its in the green.

anything you can suggest?

Zombie thread revival.....I have the same issues and have now decided I can't live with it anymore after a 6 hour drive the vibration drove me crazy.

Anyone have surefire ways of banishing this scourge?

Today i've had 4 wheel Hunter laser alignment and Road Force balance done near Glasgow to no avail. RFB values were about 35 but no other defects. A search on the interwebs doesn't shed any light on how to reduce the RFB down to sub 10.

Can anyone advise?

[snj1013]

Originally Posted by jarnold517

Zombie thread revival.....I have the same issues and have now decided I can't live with it anymore after a 6 hour drive the vibration drove me crazy.

Anyone have surefire ways of banishing this scourge?

Today i've had 4 wheel Hunter laser alignment and Road Force balance done near Glasgow to no avail. RFB values were about 35 but no other defects. A search on the interwebs doesn't shed any light on how to reduce the RFB down to sub 10.

Can anyone advise?

If your Road Force values are all 35 lbs, you will have vibrations. No if, ands, or buts about it. If the shop did a true Road Force Balance (matching the stiffest part of the tire to the lowest spot in the wheel) and not simply balancing the tire with how the tire is currently mounted to the wheel, you either have wheels with a lot of runout (or bent), or you have some very crappy tires.
In my experience, you will get a significantly better ride if you can manage to get these values below 10lbs per tire/wheel. In your case, this may take a new set of tires. Please post what tires you currently have and what wheels as well.

[jarnold517]

The guy at the place seemed to know what he was doing. Explained that the RFB tries to even out high/low spots so can only assume did the right job.

I've got 351M style wheels with Michelin Primacy 3 RFTs all round. The fronts are 245/40/R19 & the rear are 275/35/R19

Its a possibility about bent wheels due to the low profile of the rubber and the horrible roads around here. Wouldn't the RFB machine highlight a rent rim?

Luckily I am due for new tyres on the back and i'm thinking of going with a set of Dunlop SP Sport Maxx (non-RFT) as i've had them on a Jaguar prev and they did well.

I'm also thinking about moving to a square setup to help with rotation but not really too sure about the best tyre sizes for that.

[cdmulders]

Originally Posted by jarnold517

Its a possibility about bent wheels due to the low profile of the rubber and the horrible roads around here. Wouldn't the RFB machine highlight a rent rim?

Luckily I am due for new tyres on the back and i'm thinking of going with a set of Dunlop SP Sport Maxx (non-RFT) as i've had them on a Jaguar prev and they did well.

With wheel vibrations, I've found that making assumption can lead you down a wrong path, so assuming that the Road Force Balance tech would advise you on a bent wheel may be presumptuous. On the last wheel I bent (and it was bent quite a bit), I could actually feel the vibration driving 5 - 10 kph on a smooth road more than I could feel it at highway speed, so if you have not tried that experiment, it might provide some insight.

Also, on changing tires, I hope you are thinking about changing all four. If not, mixing runflats and non-runflats is a recipe for disaster.

Good luck!

[jarnold517]

Did a low speed drive and couldn't feel much if any wobbles in wheel.
Phoned the shop and spoke with the tech and they're confident that wheels weren't buckled.

Any recommendations for what size tyre will fit the wheels on a square setup?

[cdmulders]

Originally Posted by jarnold517

Any recommendations for what size tyre will fit the wheels on a square setup?

245/40/19 is an OE size on all four corners for a non-staggered setup. This is what my F10 came with from the factory. Having said that, you may have staggered wheels, since you are running wider tires on the rear. If so, I don't see much advantage in running a square tire setup unless you change your wheels too.

[jarnold517]

Originally Posted by cdmulders

245/40/19 is an OE size on all four corners for a non-staggered setup. This is what my F10 came with from the factory. Having said that, you may have staggered wheels, since you are running wider tires on the rear. If so, I don't see much advantage in running a square tire setup unless you change your wheels too.

As far as I can see the rims are 8.5 front & 9 rear. Tyre size guides say a 245 would fit the rim but can I replace the 275/35/19 with a 245/40/19 and have it be ok? Diameter changes from 675.1mm(275/35) to 678.6mm (245/40).

I would usually just go with the same sizes as whats on the car but i've got a good deal on the tyres saving about £300 if I go for 245s

[cdmulders]

Originally Posted by jarnold517

As far as I can see the rims are 8.5 front & 9 rear. Tyre size guides say a 245 would fit the rim but can I replace the 275/35/19 with a 245/40/19 and have it be ok? Diameter changes from 675.1mm(275/35) to 678.6mm (245/40)

Sure. In fact, since you would be running the same tires on all four corners, the diameters front / back would be the same so there would not be any issues for an xDrive as well. Since the rear tire (245/40/19) will be on a 9" wide wheel, it will probably appear to be a bit more stretched than the front on a 8.5" wide wheel, but I'm sure it is workable and the only drawback you might face would be cosmetic.

[DarenF]

Hi Beemers

I know this thread is old but...

Just bought a 520d 2015 B47 F10, 19" 351 alloys last week.

Same wobble from the seat between 75 and 85 and a bit under braking. Wheels balanced, pressures 32 front 33 rear. Wheel man mentioned very slight buckle on one rear but insignificant.

Bridgestone Turanza ER300 245/40R19 on fronts
Bridgestone Turanza T005 275/35R19 on rears
Big lips on brake discs but no warnings
Loads of meat on pads

Did anybody put their finger on the cause of the wobble?

Thanks

Daren

[Trian]

Have you tried road force tire balance, or just the normal tire balance? That is about the speed range where I had a shimmy. Road force balance solved it.

[DarenF]

Originally Posted by Trian

Have you tried road force tire balance, or just the normal tire balance? That is about the speed range where I had a shimmy. Road force balance solved it.

I've read a number of threads for and against but I'll give it a go tomorrow
I'll let you know
Thanks

[HighlandPete]

Originally Posted by DarenF

I've read a number of threads for and against but I'll give it a go tomorrow
I'll let you know
Thanks

If you have a slight buckle, it may be dynamically balanced, (even to zero) but that doesn't mean it will run on the road without vibrations.

Road force balance is your only way to see if it can run, without being straightened or replaced.

[zaq6pac]

check https://www.amazon.com/Bapmic-261175.../dp/B08FDG6F2X

[DarenF]

Originally Posted by zaq6pac

check https://www.amazon.com/Bapmic-261175.../dp/B08FDG6F2X

Hey Zaq
Are you stating thats the issue for the motorway speeds wobble in the front seats?
Daren

[DarenF]

Originally Posted by Apples12

Hi all

I have a 520D LCI Auto which has had an annoying vibration at motorway speeds for the last 20k miles or so, car is currently at 72k

It's been in to BMW and its had balancing done, its had road force balancing and hunter laser balancing both at BMW and a third party garage

Last week (23rd march) it went back into the dealer and it had the rear propshaft replaced, - this didnt resolve the issue

car was taken by myself to a wheel specialist who found one of the alloys was buckled - this was repaired - had no effect on the vibration

it is a very fine vibration felt through the steering wheel, floorpan and the seats, the passenger seat actually visibly shakes whilst travelling at speed.

BMW tech today stated he couldnt feel what i was talking about and was getting quite arsey, i have no idea where to go from here

the car is otherwise great, is serviced on time (and gets an interim oil change every 10k miles) brakes etc are all good, i'm told suspension is fine, however i'm looking to get a second opinion on this.

could anyone help shed some light on this issue?


thanks

Hey Apples

Did you ever get the solution to this? I have exactly the same symptoms on my 520d, 2015, 55k.

I'm getting new rear discs and pads this Wednesday, hopeful.
Someone else mentioned the rear diff bush can be shot by 55k

Thanks

Daren

[DarenF]

Originally Posted by HighlandPete

If you have a slight buckle, it may be dynamically balanced, (even to zero) but that doesn't mean it will run on the road without vibrations.

Road force balance is your only way to see if it can run, without being straightened or replaced.

Hey Pete
I had the wheels checked, all dead straight

[DarenF]

I've had new Pilot Sport 4s BMW XL ZP all round, still wobbles
New Borg & Beck discs and pads on front to get rid of the wobbles under braking at the front
I'm having new discs and pads on the rear this Wednesday. Same brand again

If I take a wheel off, should I clean the hub/disc face of all grease before i put the wheel back or should it always be greased?

[HighlandPete]

Originally Posted by DarenF

If I take a wheel off, should I clean the hub/disc face of all grease before i put the wheel back or should it always be greased?

Ensure the faces are clean and dry. Any anti-seize grease/compound should only be applied to the hub/spigots, not the clamping faces.

[natesi]

Check this out