This is exciting: https://www.bikerumor.com/2017/07/07/prototype-shimano-emtb-rotor-concept-becomes-new-steps-integration/
Interesting (not sure if 'exciting' though). Looks more like an anti hacking method than anything else to me.
@Chak started
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This is exciting: https://www.bikerumor.com/2017/07/07/prototype-shimano-emtb-rotor-concept-becomes-new-steps-integration/