640d inner rear tyre wear 😮

Big G 1979 · 11-27-2023, 03:03 AM

Hi guys newbie here so go easy please. Recently bought my first BMW two weeks ago it's a F13 640d and I'm in aww. I was having a look round her at weekend and noticed that the drivers rear wheel as serious inner wear. I have read a few posts etc people saying it's down to run flat tyres and some say camber etc. anyone here point me in right direction.

BMWRog · 11-27-2023, 02:22 PM

Hi and welcome to the forum.

That almost looks like the tyre has been rubbing against something. Tyres on the F12/F13 series are sensitive to pressure variations, so make sure your tyre pressures are spot on. Be a good idea to also check for any play in the rear suspension joints.

Big G 1979 · 11-27-2023, 02:27 PM

[QUOTE=BMWRog;30688370]Hi and welcome to the forum.

That almost looks like the tyre has been rubbing against something. Tyres on the F12/F13 series are sensitive to pressure variations, so make sure your tyre pressures are spot on. Be a good idea to also check for any play in the rear suspension joints.

Thanks for the reply, I've only recently bought the car and I have to say I found the tyres unpressurized by around 5 psi so I'm hoping that the low pressure and the hard side wall of run flats has caused this. I have opted for a new set of normal tyres to replace these with should I still use the OEM pressures even though they aren't RFT? I think it's 2.4 bar all round

BMWRog · 11-28-2023, 11:05 AM

I don't run a 640, but my guess would be tyre pressures should be the same for both normal and RFTs. Given the opportunity, I'd get a full four wheel alignment, for peace of mind if nothing else. I take it you are running the manufacturers recommended size of wheel and tyre. Opting for bigger and/or wider tyres and wheels might bring the tyre(s) into conflict with parts of the suspension, and hence the strange wear pattern. A good tyre fitter should be able to spot this.

Big G 1979 · 11-28-2023, 11:18 AM

[QUOTE=BMWRog;30690567]I don't run a 640, but my guess would be tyre pressures should be the same for both normal and RFTs. Given the opportunity, I'd get a full four wheel alignment, for peace of mind if nothing else. I take it you are running the manufacturers recommended size of wheel and tyre. Opting for bigger and/or wider tyres and wheels might bring the tyre(s) into conflict with parts of the suspension, and hence the strange wear pattern. A good tyre fitter should be able to spot this.

Thanks yeah everything standard fitment wise (255/35/20F & 275/30/20R) and I'll stick with OEM pressures I will also opt for the 4 wheel alignment for piece of mind

11-27-2023, 03:03 AM	#1
Big G 1979 New Member 0 Rep 13 Posts Drives: BMW 640d Join Date: Nov 2023 Location: South Wales iTrader: (0)	640d inner rear tyre wear 😮 Hi guys newbie here so go easy please. Recently bought my first BMW two weeks ago it's a F13 640d and I'm in aww. I was having a look round her at weekend and noticed that the drivers rear wheel as serious inner wear. I have read a few posts etc people saying it's down to run flat tyres and some say camber etc. anyone here point me in right direction. Attached Images
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11-27-2023, 02:22 PM	#2
BMWRog Private First Class 19 Rep 126 Posts Drives: 2014 M6 Convertible Join Date: Feb 2017 Location: Oxfordshire, U.K. iTrader: (0)	Hi and welcome to the forum. That almost looks like the tyre has been rubbing against something. Tyres on the F12/F13 series are sensitive to pressure variations, so make sure your tyre pressures are spot on. Be a good idea to also check for any play in the rear suspension joints.
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11-27-2023, 02:27 PM	#3
Big G 1979 New Member 0 Rep 13 Posts Drives: BMW 640d Join Date: Nov 2023 Location: South Wales iTrader: (0)	[QUOTE=BMWRog;30688370]Hi and welcome to the forum. That almost looks like the tyre has been rubbing against something. Tyres on the F12/F13 series are sensitive to pressure variations, so make sure your tyre pressures are spot on. Be a good idea to also check for any play in the rear suspension joints. Thanks for the reply, I've only recently bought the car and I have to say I found the tyres unpressurized by around 5 psi so I'm hoping that the low pressure and the hard side wall of run flats has caused this. I have opted for a new set of normal tyres to replace these with should I still use the OEM pressures even though they aren't RFT? I think it's 2.4 bar all round
	Appreciate 0 Quote

11-28-2023, 11:05 AM	#4
BMWRog Private First Class 19 Rep 126 Posts Drives: 2014 M6 Convertible Join Date: Feb 2017 Location: Oxfordshire, U.K. iTrader: (0)	I don't run a 640, but my guess would be tyre pressures should be the same for both normal and RFTs. Given the opportunity, I'd get a full four wheel alignment, for peace of mind if nothing else. I take it you are running the manufacturers recommended size of wheel and tyre. Opting for bigger and/or wider tyres and wheels might bring the tyre(s) into conflict with parts of the suspension, and hence the strange wear pattern. A good tyre fitter should be able to spot this.
	Appreciate 1 Big G 19790.00 Quote

11-28-2023, 11:18 AM	#5
Big G 1979 New Member 0 Rep 13 Posts Drives: BMW 640d Join Date: Nov 2023 Location: South Wales iTrader: (0)	[QUOTE=BMWRog;30690567]I don't run a 640, but my guess would be tyre pressures should be the same for both normal and RFTs. Given the opportunity, I'd get a full four wheel alignment, for peace of mind if nothing else. I take it you are running the manufacturers recommended size of wheel and tyre. Opting for bigger and/or wider tyres and wheels might bring the tyre(s) into conflict with parts of the suspension, and hence the strange wear pattern. A good tyre fitter should be able to spot this. Thanks yeah everything standard fitment wise (255/35/20F & 275/30/20R) and I'll stick with OEM pressures I will also opt for the 4 wheel alignment for piece of mind
	Appreciate 0 Quote