I recently put a 26 X 1-1/2" Weinmann 519 front wheel on my 1987 GT Mt. bike. I couldn't get adaquete stopping power with the old brake pads, so I installed a new set of Kool Stop Eagle 2 (threaded stem) pads. Now my brakes are worse than ever. I cleaned the rim surface, adjusted the cables, and checked to make sure the pads were making good contact, but still no brakes. Is there something I'm overlooking? The only way I can get adequate brakes is by squeezing the brake lever as hard as I can.