'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
The barrel adjuster on the brake arm where the cable housing enters will reduce the clearance between the pads and the rim. Eventually it will run out of travel and you have to do one (or both) of two things.
1. Replace the pads with new ones.
2. Screw the adjuster back in all the way, loosen the cable clamp bolt and take some slack out of the cable.