I have installed on my bike brand new cantilever brakes (Shimano CX-70).
On the rear, the braking is justas efficient as I would have expected it to be.
But on the front, it feels quite weak. Front braking is usually more efficient that rear but in my case it is not. Actually, stopping by using only the front brake would take very long. It is just powerful enough to maintain a low speed in downhills or increase the braking power of the rear (I get a little more power when squeezing the levers from the drops position).
But obviously the rear braking can only be as much efficient as the rear braking can get, with the limitation of all the weight and traction concentrated on the front that should make it the most efficient brake.
Obviously I checked the installation of my brake:
- The pads are in perfect condition
- They get in contact with the rim about 1-2 mm from the very top of the rim (and the beginning of the tire)
- they have a < 2 mm clearance between rim and pad and that distance is the same on both sides
- I installed properly a cable stop (http://www.aspirevelotech.com/images/Paul%20Components/041-FunkyMonkeyFrontCableHanger-Black.jpg)
- the cable condition is very good, as is the housing and it is properly lubricated
What else could it be?
For the record, the rims are also in very good condition and I do know that the brakes are not exactly the same model on the front and the rear and yes I have purchased the right versions and yes the front is installed in the front and the rear on the rear.
I mean, I could understand that the brakes are crap, but in that case a similar model would not be working properly on the rear. So even if the whole mechanism were just exactly operating the same as in the rear, I would get at least as much and probably even way more efficiency on the front.
I just don't understand.