It may be a harder pad is needed, pads are usually available as follows:
ORGANIC: Soft pad, quicker to bed in, but a fairly short life.
SINTERED: Harder pad, takes a while to fully bed in but longer lasting.
CERAMIC: Very hard, generally used in high demand competition applications such as downhill racing.
How long the pads will last depends on many things, but generally those small 17-22 mm diameter pads fitted to entry level brakes will have a much shorter life than the comparatively huge surface area of the Avid BB7's.
ORGANIC: Soft pad, quicker to bed in, but a fairly short life.
SINTERED: Harder pad, takes a while to fully bed in but longer lasting.
CERAMIC: Very hard, generally used in high demand competition applications such as downhill racing.
How long the pads will last depends on many things, but generally those small 17-22 mm diameter pads fitted to entry level brakes will have a much shorter life than the comparatively huge surface area of the Avid BB7's.