Enamel for alloy wheel?

[Avocet]

No. Not possible for brake debris to get under paint. The iron came directly from the factory.

Ah... always the conspiracy rather than the reality...

The mechanism is well understood, (well, by sane people, at any rate...)

Asbestos-free pads tend to contain ferrous compounds in the friction material. They're way harder than old style brake pads, hence the high disc wear rate these days. Ferrous particles from both the pad and the disc that make up part of the brake dust sit on the painted surface of the wheel and eat into the lacquer as they "rust", if the wheels aren't cleaned regularly.

But by all means, if you prefer to go with the sinister masked saboteur, sneaking round the aluminium foundry with his egg cup full of iron filings, intent on mischief, that's OK with me...

 

[Avocet]

You wouldn’t even accept an answer if it were from the worlds top expert and you were being paid to accept it. Your 'conversation' would end. Admit it, you’re lonely and the only way you can get to talk to people is to argue with them. How sad. Still, page 4 now. Keep going, you might drag a few more into your lonely sad world.

I would have thought, *especially* if you were the world's top expert!

 

[DiyNutJob]

I would have thought, *especially* if you were the world's top expert!

He's not though. He said valve stem cannot be changed without opening tyre. What do you say? I know you are not a world expert, you just don't have the feel for it.

 

[Avocet]

He's not though. He said valve stem cannot be changed without opening tyre. What do you say? I know you are not a world expert, you just don't have the feel for it.

No, not a world expert, just bright enough to know the things I know a reasonable amount about, and those I don't. (A strategy that has served me well, over the years)... I didn't know there were different valves for alloy and steel rims, for example, so I've learned something from this thread - and probably in a rather easier way than you're about to!

 

[DiyNutJob]

People gamble too much and they loose, with loose mouth!

Job completed with resounding success. A summary of innovation and lessons learned to follow.

 

[Mottie]

He said valve stem cannot be changed without opening tyre.

I said nothing of the sort. I said if there is corrosion inside the rim around the valve stem hole causing a leak, you won’t be able to check and clean it without breaking the tyre bead. I even explained it pictorially as you don’t seem to understand the written word.

 

[Mottie]

People gamble too much and they loose!

Job completed with resounding success. A summary of innovation and lessons learned to follow.

View attachment 417802

All that shows is a tyre being pumped up. You could do that with a leaking valve, a leaking bead seat or even a small hole in the tyre. Proves absolutely nothing.