• Too much power for 160 to start with.

    180 rotors was the lower end for competitive riders and 205 is pretty much standard nowadays.

  • Presumably though, they just made the pistons smaller for road use?

    How can they have too much power? It's not like they're going to bend a rotor is it? It's just a question of 'can I apply these enough to slow down rapidly, without immediately exceeding tyre grip?'

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