On my old bike, the Ironhorse Excelsior Comp, I have Tektro brakes on them. I thought they are stiff on the brake levers and offer so-so stopping power. Until I got a deal on the Specialized Roubaix Pro that comes w/ Ultegra brakes. The Roubaix's brake is a totally different world. The stopping power is simply amazing. Now I know how bad the Tektro brakes are.
Question is, is there any way for me to improve the braking performance of the Tektro brakes? I tried different pads (even using Ultegra pads) w/o any real improvement. What makes the Ultegra brakes so much better than Tektro? Is the Tektro return spring just so stiff that it make it hard to put enough pressure on the rim?
If the only way to improve the braking performance is to change the brakes, then would 105 be a fair improvement over Tektro?