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  • Do shimano 105 br5800 come in different drop/reach sizes or am I dumb: I had one on my bike with different pads and a different rim and it reached the brake track fine, put another one on and it’s no bueno - too short. The rim or brake pads shouldn’t make a difference should it?

  • rim or brake pads shouldn’t make a difference should it?

    The pads move in an arc, so rim width makes a very slight difference to effective drop. Not all pads/shoes are precisely centred on the holding screw. Rims with the same bead seat diameter don't necessarily have exactly the same overall diameter.

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