Discussion
The car is a 840d.
Two MOT advisories being a bulge in a rear tyre and a front tyre with a low thread.
Does this mean that I need to replace all four (having to replace both axels with it being a 4 x 4)?
I’ve currently Bridgestone Potenza runflats, any suggestions on whether to stick or switch?
I may update this if any questions come in.
Two MOT advisories being a bulge in a rear tyre and a front tyre with a low thread.
Does this mean that I need to replace all four (having to replace both axels with it being a 4 x 4)?
I’ve currently Bridgestone Potenza runflats, any suggestions on whether to stick or switch?
I may update this if any questions come in.
Personally, I think Potenzas are one of the worst "Premium" tyres I have ever had the misfortune to have on a car, in run-flat guise they were even worse.
I would change all 4 on sight never mind what condition they are in.
Even when they were first made they were "middle of the road" at best & tyre technology has come on a long way since then.
The only caveat to the above opinion being that apparently the new "Potenza Sport" are pretty good, but you don't say that it is these.
I would change all 4 on sight never mind what condition they are in.
Even when they were first made they were "middle of the road" at best & tyre technology has come on a long way since then.
The only caveat to the above opinion being that apparently the new "Potenza Sport" are pretty good, but you don't say that it is these.
Edited by E-bmw on Wednesday 11th December 07:53
E-bmw said:
Personally, I think Potenzas are one of the worst "Premium" tyres I have ever had the misfortune to have on a car, in run-flat guise they were even worse.
I would change all 4 on sight never mind what condition they are in.
Even when they were first made they were "middle of the road" at best & tyre technology has come on a long way since then.
The only caveat to the above opinion being that apparently the new "Potenza Sport" are pretty good, but you don't say that it is these.
Agree; they were what were on the 20" alloys on my previous F01 and they were dreadfulI would change all 4 on sight never mind what condition they are in.
Even when they were first made they were "middle of the road" at best & tyre technology has come on a long way since then.
The only caveat to the above opinion being that apparently the new "Potenza Sport" are pretty good, but you don't say that it is these.
Edited by E-bmw on Wednesday 11th December 07:53
Dropped to 19s, non RFT Falken FK510s and they were superb
Pica-Pica said:
The Gauge said:
Does the X-Drive system require both tyres on same axel to be changed even if only one tyre is worn/punctured?
I have never changed both to keep the tread depths exactly the same across axle. I don’t know the official line, if there is one.I’m looking to move from the Bridgestone Potenzas to Pirelli P Zeros. Im taking to my local Indy and I’ll see what he says.
Pica-Pica said:
The Gauge said:
Does the X-Drive system require both tyres on same axel to be changed even if only one tyre is worn/punctured?
I have never changed both to keep the tread depths exactly the same across axle. I don’t know the official line, if there is one.I’m looking to move from the Bridgestone Potenzas to Pirelli P Zeros. Im taking to my local Indy and I’ll see what he says.
If you want Runflat, swap em' out for Pilot Sport 4 Zero pressure.
If you want non-run flat, swap em' out for Conti Sport Contact 7.
They are currently the best options in each tyre type.
I've used them both and they are light years better than the crap BMW fit as OE standard equipment. The Bridgestones in particular are famous for bulging and premature outer tread block wear.
If you want non-run flat, swap em' out for Conti Sport Contact 7.
They are currently the best options in each tyre type.
I've used them both and they are light years better than the crap BMW fit as OE standard equipment. The Bridgestones in particular are famous for bulging and premature outer tread block wear.
thebullettrain said:
Pica-Pica said:
The Gauge said:
Does the X-Drive system require both tyres on same axel to be changed even if only one tyre is worn/punctured?
I have never changed both to keep the tread depths exactly the same across axle. I don’t know the official line, if there is one.I’m looking to move from the Bridgestone Potenzas to Pirelli P Zeros. Im taking to my local Indy and I’ll see what he says.
This issue comes up frequently a quick google will give you loads of threads on Bimmerpost regarding the issue (there's an awful lot more knowledge on that forum than this)
BMW published a TIS regarding the changing of tyres on xdrive cars and recommended no more than a 2mm difference as below, this info was mirrored by my service dept on the occasions that I had to change a single tyre on some of the xdrive BMWs that I've had namely a 335d and 740d, thankfully they were within the tolerance.
You can do what you like and believe what you like, but that's what BMW say.
Wills2 said:
This issue comes up frequently a quick google will give you loads of threads on Bimmerpost regarding the issue (there's an awful lot more knowledge on that forum than this)
BMW published a TIS regarding the changing of tyres on xdrive cars and recommended no more than a 2mm difference as below, this info was mirrored by my service dept on the occasions that I had to change a single tyre on some of the xdrive BMWs that I've had namely a 335d and 740d, thankfully they were within the tolerance.
You can do what you like and believe what you like, but that's what BMW say.
But they don’t put it in the handbook, or in the on-line handbook. Why is that do you think?BMW published a TIS regarding the changing of tyres on xdrive cars and recommended no more than a 2mm difference as below, this info was mirrored by my service dept on the occasions that I had to change a single tyre on some of the xdrive BMWs that I've had namely a 335d and 740d, thankfully they were within the tolerance.
You can do what you like and believe what you like, but that's what BMW say.
Gassing Station | BMW General | Top of Page | What's New | My Stuff