On my 312 K5, the tender wheels appear somewhat gold like in colour.
On my 307 they appear more bronze or copper like in colour.
I had to interchange a set and know they are similar in size but not colour.
Is the metal composition different? Does one conduct electricity better than the other?
Curious about the differance and purpose.
I've managed to get the wheel spark down to a minimum. Seems AF prefers very clean wheels and track.
Less forgiving than O.