Thoughts on this tyre

[Oortam]

I hit a pothole today with my front nearside tyre, slowing to enter a garden centre so not going fast. Was a bit of a thump so checked the wheel after I got home. The wheel is unmarked but there is a small bulge on the tyre wall and what looks like a hole in the side wall top layer. Will this need a new tyre? It's a runflat P zero on a BMW 440i.

[CoreyDog]

I'd be changing that ASAP.

[interstellar]

I wouldn’t be driving on that personally.

[mmm-five]

It's also deflated, so it must have been a big bump, or something went through the sidewall at the same time, or you caught the edge enough to push it off the rim...which is not easy with a runflat tyre on a runflat rim.

Have you driven on it at all?

[Four Litre]

That's toast, even without the hole...

Sorry for your loss

[Little Pete]

That needs replacing.

[Haltamer]

Very sketchy; Definitely done for.

[snoopy25]

Def change it

[jhonn]

CoreyDog said:

I'd be changing that ASAP.

+1. Very fortunate that your rim seems to be unmarked! Bloody annoying though..

[kambites]

Yeah that's damaged the structure of the sidewall, it's going to fail at some point; it's probably not going to blow up on the way to the tyre fitters but I'd get it replaced ASAP and keep a very close eye on it until you do. Looking at how close the damage is to the rim, you were pretty lucky not to damage that too!

[talksthetorque]

OP - have you checked the air pressure in the tyre?

[g3org3y]

As above, replace. Sidewall is compromised.

Any TPS warning out of interest?

[anonymous-user]

I'm no crybaby and have driven the odd death trap but that's fooked

[eldar]

Worth checking the wheel isn't distorted. Bloody potholes.

[TarquinMX5]

It might be worth checking the wheel whilst the tyre's off, numerous reports of some BMW alloys, particularly 19" ones, cracking when hitting potholes (and yes, tyre needs replacing, unfortunately).

[donkmeister]

Surprised if you wouldn't hear it thrumming away if you tried to do any sort of motorway speed on it...

I had a similar oopsie driving up the ramp from the le shuttle platform in France; 5ish mph, same as everyone else, in a little MG with 40-section tyres (so not a 3-tonne beast on 20-profiles doing 50 through a pothole). Massive bang as I drove over what looked like a join between two sections of concrete and the tyre had gone a bit out of round. Spare wheel on, and when I had the tyre replaced they said it was possibly a steel cord snapping inside the tyre.

[Oilchange]

stickleback123 said:

I'm no crybaby and have driven the odd death trap but that's fooked

Quite. Looks like a great opportunity to switch to normal tyres.

[Kawasicki]

The bulge is there because carcass cords have been cut/torn, and that area of the sidewall has lost structural strength.

Change it.

[Pica-Pica]

eldar said:

Worth checking the wheel isn't distorted. Bloody potholes.

Yes, check the inboard edge of the rim too/especially,

[Oortam]

I thought it was toast but confirmation is welcome. The tyre isn't deflated and no warning on TPMS. I was travelling slowly so that's probably just as well. I'm surprised the wheel is unmarked, but I'll get it checked when the tyre is off. Now I have to look for replacements for the front. I'll probably take the opportunity to get rid of the runflats. Maybe Michelin PS4 or Goodyear Eagle F1.