I’m currently looking to buy some carbon wheels, rim brake obviously given the question on brake pads. I currently have alloy rims which I would like you use as spares at races or potentially in the rain, etc.

my my question is regarding brake pads. I know I need carbon pads for carbon rims. Is it a problem to use carbon pads on alloy rims? Do I need to switch pads when switching wheels? Obviously this can’t be done in a wheel pit mid race, so if racing carbon do I need carbon spares?

thanks