Just noticed a slight bulge in my tyre

[robdex1]

Only just noticed it now don't know how long it's been like that for. Is it dangerous to drive. I'm currently out at work as a delivery driver and it being christmas day I don't know if any tyre shops will be open. My journey home involves going about 12 miles on the motorway so I really don't know what to do. The tyre needs replacing soon anyway as fairly worn.

[GreenV8S]

The structure of the tyre is compromised. Definitely not safe at motorway speeds - it could blow at any moment.

[Scrump]

GreenV8S said:

The structure of the tyre is compromised. Definitely not safe at motorway speeds - it could blow at any moment.

[itcaptainslow]

That’s an immediate MOT failure and unsafe - replace ASAP.

[soad]

Take it easy at around 50mph, should be okay. Needs replacing asap though.

[robdex1]

I'll try to put the spare on

[robdex1]

Found a place that is open that says they have a part worn tyre for £30. But reluctant But they don't have new ones

[hidetheelephants]

Scrump said:

GreenV8S said:

The structure of the tyre is compromised. Definitely not safe at motorway speeds - it could blow at any moment.

Yarp. If the motorway is unavoidable stick to the left hand lane and annoy truckers by doing 50. Being alive and honked at by yorkie munchers is preferable to being a christmas day news story about fiery death and a motorway pile-up.

[Pitre]

If you're going to risk it and drive home slowly, is there any chance you can chuck some 'tyre repair foam' in before you go?

[stevieturbo]

soad said:

Take it easy at around 50mph, should be okay. Needs replacing asap though.

Pretty much this.

If it goes flat, it goes flat, but more than likely it'll be fine.

[stevieturbo]

Pitre said:

If you're going to risk it and drive home slowly, is there any chance you can chuck some 'tyre repair foam' in before you go?

repair foam would be totally pointless, they can do nothing at all for sidewall damage

[hidetheelephants]

stevieturbo said:

Pitre said:

If you're going to risk it and drive home slowly, is there any chance you can chuck some 'tyre repair foam' in before you go?

repair foam would be totally pointless, they can do nothing at all for sidewall damage

only any use at stopping or slowing leaks from small punctures; if that goes it's likely to tear and take a big flap of the sidewall with it.

[Pitre]

hidetheelephants said:

stevieturbo said:

Pitre said:

If you're going to risk it and drive home slowly, is there any chance you can chuck some 'tyre repair foam' in before you go?

repair foam would be totally pointless, they can do nothing at all for sidewall damage

only any use at stopping or slowing leaks from small punctures; if that goes it's likely to tear and take a big flap of the sidewall with it.

Sure, no use if it goes bang. But there's obviously an air leak into a sidewall blister so it might just stop it getting worse?

[stevieturbo]

Pitre said:

Sure, no use if it goes bang. But there's obviously an air leak into a sidewall blister so it might just stop it getting worse?

foam or any goo product will be thrown to the main tread of the tyre from centripetal forces when driving. It would never get to the sidewall

And the tyre has been compromised, no goo type product will do anything now. It's not so much air causing the bubble ( although it sort of is ), it's the tyre structure is damaged. Nothing can fix that properly or stop the inevitable

[E-bmw]

If the place still has the part worn or you have a spare, just do that until you can get a proper replacement rather than a "stress-purchase" of a new tyre at a premium price.

[robdex1]

E-bmw said:

If the place still has the part worn or you have a spare, just do that until you can get a proper replacement rather than a "stress-purchase" of a new tyre at a premium price.

Yeah I got the part worn one in the end. It looked OK and I measured the tread still has about 6mm left. My worry is that it hasn't been tested properly so how do I know how safe it is. Maybe I should have just asked them to put the spare on for me but I was under time pressure and just decided to get it replaced

[E-bmw]

robdex1 said:

E-bmw said:

If the place still has the part worn or you have a spare, just do that until you can get a proper replacement rather than a "stress-purchase" of a new tyre at a premium price.

My worry is that it hasn't been tested properly so how do I know how safe it is.

It is a tyre that has previously been on a different wheel.

It has now been pumped up & I assume it holds pressure.

It has therefore been tested as much as the other tyres on your car.

Unless you immediately change all 4 tyres on your car when you buy it you have been driving around more years on part-worns than on "new" tyres.

[stevieturbo]

E-bmw said:

Unless you immediately change all 4 tyres on your car when you buy it you have been driving around more years on part-worns than on "new" tyres.

Whilst I wouldn't be a fan of buying part worns myself.....even your own vehicle after a few thousand miles, many could be oblivious to defects and happily drive on to the point of failure.

So it probably doesn't make a lot of sense not to buy them as long as they've came from a trusted source, and they genuinely are not selling defected tyres, but actual good part worn tyres.

You can never truly know the history of tyres, especially on a second hand vehicle

[E-bmw]

stevieturbo said:

E-bmw said:

Unless you immediately change all 4 tyres on your car when you buy it you have been driving around more years on part-worns than on "new" tyres.

Whilst I wouldn't be a fan of buying part worns myself.....even your own vehicle after a few thousand miles, many could be oblivious to defects and happily drive on to the point of failure.

You can never truly know the history of tyres, especially on a second hand vehicle

Quite right, at least you/tyre fitter have the opportunity to do a full all-round inspection of them after a period of use.

[5s Alive]

Changed my elderly neighbours tyre recently for exactly the same thing. Friend had advised her it would be fine to drive on at less than 50mph. No chance I thought so changed it immediately. Jacked the car to take weight off the tyre and then deflated it before removal to protect myself and whoever may then handle it. Removed the valve core to prevent reinflation.

Here's the reason for caution.

https://www.dailyrecord.co.uk/news/scottish-news/u...