• Do Shimanos STI levers work with MTB calipers? I've got some (admittedly old) SLX calipers that have been in a tool box for about 4 years, could I buy some of the RS685 levers and use them on the road bike?

  • If the calipers have 22mm (white ceramic) pistons then yes.

    if the pistons are aluminium edge, black center / 21mm then also yes but you now get more less mechanical advantage and levers move less for same brake action and probably feel too hard (but could work, never heard of anyone trying it).

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