Joined: Jun 2014
Posts: 4,628
Likes: 943
From: Ontario, Canada
Bikes: iele Latina, Miele Suprema, Miele Uno LS, Miele Miele Beta, MMTB, Bianchi Model Unknown, Fiori Venezia, Fiori Napoli, VeloSport Adamas AX
SLR = Shimano Linear Response. They put a return spring into the brake lever and lightened the force exerted by the spring in the then single pivot brake caliper. That made for a "lighter" feel at the brake lever.
Cheers