the weinman double pulls should work as well as anything else - have you tried different pads or pad angle? or even rims? those calipers were used on touring bikes designed for fully loaded touring - sometimes carrying 20 stone down hills. i wouldn't be too much in a rush to overlook them. THE CABLE AT THE TOP SETS THE AMOUNT OF MECHANICAL FORCE YOU CAN EXERT FOR A GIVEN AMOUNT OF PULL - YOU CAN GET 3 OR 4 DIFFERENT LENGTHS - TRY A SHORTER LENGTH FOR MORE POWER BUT LESS TRAVEL IN THE CALIPER
or try the rx100 ones (a400 i think )
or miche performance - very similar to rx100 - less thAN 20 GBP A PAIR
the weinman double pulls should work as well as anything else - have you tried different pads or pad angle? or even rims? those calipers were used on touring bikes designed for fully loaded touring - sometimes carrying 20 stone down hills. i wouldn't be too much in a rush to overlook them. THE CABLE AT THE TOP SETS THE AMOUNT OF MECHANICAL FORCE YOU CAN EXERT FOR A GIVEN AMOUNT OF PULL - YOU CAN GET 3 OR 4 DIFFERENT LENGTHS - TRY A SHORTER LENGTH FOR MORE POWER BUT LESS TRAVEL IN THE CALIPER
or try the rx100 ones (a400 i think )
or miche performance - very similar to rx100 - less thAN 20 GBP A PAIR