My new SA levers are 27/ 37 mm. I've been using 37mm for everything, Rohloff Spyre, SA XL drum brakes and lately a roller brake.
They all work fine, the Spyre can stop instantly any time. Others say Spyre and drum brakes are wrong for long pull. LOL. The roller brake definitely needs a long pull.
My older model SA levers are 41/ 29 mm. They are now with an old CCM caliper and new SA RD3. Way less effective for whatever reason. Probably would be better with short pull on the caliper.
Last edited by GamblerGORD53; 10-30-21 at 12:06 AM.