The ones you linked are 1x and the teeth are also carbon so there a waste of money
Ok link deleted. Seem like they are Brompton only, shame looked promising.
Will consider the Cybrei rings, asked why they have paired 54 with 38t and they said for climbing.
IMO that's what 52/36 and 50/34 are for, 54-38 is a bit of a jump.
Rather have there meta aero rings in 54/40