Was going to buy some to match my hope hubs. My brakes are formula oro k24s currently running 180mm rotors. The hope rotors are sized at 183mm so would they fit ok without the need for new mount adaptors?

they sell 180mm saw-tooth floating rotors as well. just buy some instead of the 183mm ones :-/

oh really? on the shop sites i went on it just said 183mm

The difference is only 1.5 mm as you are mounting on radius not diameter I run 183 mm rotor on a 180 mm mount without issue you could use a washer to move it further out.

Wiggle