Bubble on rear tyre, advice needed ?

[Ralf*]

I hit something on the road yesterday, both front and rear driver side now have a large and smaller bubble respectively on the side wall.

Why do you'll say both need to be replaced on the rear if only one is damaged?

By the same reasoning is it necessary for me to replace all four of them?

Thanks,
Derrick

are your front and rear tyres different sizes ?
otherwise you could use the two good tyres from the left side and utilize them on either the front or the rear,

If they are different (narrow and wide), then the "norm" is to always replace tyres as a set...either both front or both rear, this is normally true if the wear on your existing tyres is such that it will make a significant difference to the rolling diameter of the used vs the new tyre.

Another bigger concern, is that if you hit something "THAT HARD" to cause an RFT to bubble, it might be worth to also have the suspension (shock mountings etc) and the mags inspected for damage, not quickly vizible

 

[Derrick125]

I hit something on the road yesterday, both front and rear driver side now have a large and smaller bubble respectively on the side wall.

Why do you'll say both need to be replaced on the rear if only one is damaged?

By the same reasoning is it necessary for me to replace all four of them?

Thanks,
Derrick

are your front and rear tyres different sizes ?
otherwise you could use the two good tyres from the left side and utilize them on either the front or the rear,

If they are different (narrow and wide), then the "norm" is to always replace tyres as a set...either both front or both rear, this is normally true if the wear on your existing tyres is such that it will make a significant difference to the rolling diameter of the used vs the new tyre.

Another bigger concern, is that if you hit something "THAT HARD" to cause an RFT to bubble, it might be worth to also have the suspension (shock mountings etc) and the mags inspected for damage, not quickly vizible

Thanks for that.
Front and rears are different sizes - Autobahn will assess for damage tomorrow.
I doubt the tyre insurer (PinnAfrica) will agree to replacing the other two for the reasons you state above; I will try though.

 

[Quick///M]

so i have tried bridge stone unfortunately they don't cover this. Minty's told me there is no stock of Potenza's in the country not sure how true this is. I will make more calls tomorrow

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Thanks for the advice everyone :cartel:

 

[Ralf*]

so i have tried bridge stone unfortunately they don't cover this. Minty's told me there is no stock of Potenza's in the country not sure how true this is. I will make more calls tomorrow

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Thanks for the advice everyone :cartel:

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what size tyres are you looking for ?

 

[Quick///M]

so i have tried bridge stone unfortunately they don't cover this. Minty's told me there is no stock of Potenza's in the country not sure how true this is. I will make more calls tomorrow

---

Thanks for the advice everyone :cartel:

---

what size tyres are you looking for ?

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Bridge stone Potenza run flats, 245 35 R18

 

[Drama]

Eish sorry bro! RFT's make big holes in one's pockets

Will need to replace my back ones soon... but that's because going side ways is fun:=):

 

[Ralf*]

so i have tried bridge stone unfortunately they don't cover this. Minty's told me there is no stock of Potenza's in the country not sure how true this is. I will make more calls tomorrow

---

Thanks for the advice everyone :cartel:

---

what size tyres are you looking for ?

---

Bridge stone Potenza run flats, 245 35 R18

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3 available in Jhb and two available in CapeTown I was told

 

[phantom]

Ninety percent of bubbles come from potholes as the energy has to be taken up somewhere.The positive is that the RFT tyres take up the punch and not the rim.On a normal tyre the rim invariably ends up being buckled or bent,especially on the inside where there is no support.
Replace both tyres and keep the other for spare, or ,advertise it and recoup some of the damage.
Just remember that if your vehicle picks up a problem in the suspension area and BMW find a faulty (bubble) tyre your warrantee may come into question.

 

[Ralf*]

Ninety percent of bubbles come from potholes as the energy has to be taken up somewhere.The positive is that the RFT tyres take up the punch and not the rim.On a normal tyre the rim invariably ends up being buckled or bent,especially on the inside where there is no support.
Replace both tyres and keep the other for spare, or ,advertise it and recoup some of the damage.
Just remember that if your vehicle picks up a problem in the suspension area and BMW find a faulty (bubble) tyre your warrantee may come into question.

interesting last sentence

wonder if they can enforce this though

 

[DieselFan]

Surely it's the other way round as nonrfts have more flex and therefore cushioning and disperse the force of the imact. Where as an rfts sidewall there's little cushioning and little dispersion of the force of impact and hits the rim harder on the side?

 

[Ralf*]

Surely it's the other way round as nonrfts have more flex and therefore cushioning and disperse the force of the imact. Where as an rfts sidewall there's little cushioning and little dispersion of the force of impact and hits the rim harder on the side?

the way I understand it in my mind

a hard impact on a standard tyre, because the side wall is so flexible, the impact force are great enough to allow the sidewall to collapse or compress to such an extent, that eventually the actual rim now makes contact with the pothole/curbstone

The RFT tyre sidewall won't compress or collapse to the same amount, and for the same amount of impact damage, the actual rim might therefore not come in contact with the offending pothole or curbstone, because the harder sidewall will still provide a level of intervening protection.

As far as I know....(IMHO) a buckled rim doesn't happen due to the force applied by the tyre or tyre sidewall onto the rim, but rather due to the actual rim comming in contact with the road/pothole/curbstone surface, and this due to the fact that the tyre sidewall has all but given way under the impact force, and allowed the rim to make contact, or if the tyre sidewall is still present, its relative thin-ness provides no cushioning effect, and the impact force is almost directly applied onto the rim

 

[Derrick125]

BMW have advised that ALL 4 of my rims are buckled.
These are OEM wheels with no visible indication of damage. There are bubbles on two tyres.

Any sufficient force will make it's way to the rim and even beyond.
S.A's potholes are not for sissies apparently.

 

[DieselFan]

Do you know how hard you need to hit a pot hole for the rim go touch tar.....

The energy is still transfered from rft side wall to rim.

I hear about rfts bubbling all the time. Yet ive never had a bubble or buckled rim in my 8 years of driving. Maybe I'm just lucky?

 

[GPGrobler]

That bubble is a ticking time bomb, rather replace the tyre than the whole car I'd say ...