by Oli Jordan
Hello everyone! I have a whistle miwok bike, love it. The front hydraulic disc brake has become a lot weaker since I bought it. The back is still bomb proof. I’ve realigned the pads, roughed up the pads and now I’m at a bit of a loss … It’s only a month or so old, bought from an online company.
What can it be? Any advice appreciated..
There are a couple of possible causes for you loss of power. I’ll help you put a finger on which one it could be.
1) Hydraulic brakes are a closed system. In order to get full braking power there has to be zero air in the system. So a brake bleed could be the simple fix. You can pick up a brake bleed kit from your local shop or for a lot less hassle … have a professional do the work.
2)Pad wear: since your using a closed system and there is no reservoir like on a car or motorcycle, pad wear plays a huge role in braking power. When you have new pads the piston travel is short and responsive. As they wear the pistons have to travel farther to make contact with the rotor. Due to the amount of fluid in the system being static (not having a constant feed from a reservoir) your brakes will lose power, because they need more fluid to push with the same force. So replacing pads as they wear to the spring thickness will keep your braking power constant. When you replace your brake pads be sure to press the piston back into the caliper to reset them. Install your pads and wheel and pump the breaks to reset them.
Try these 2 tricks and if you need more help, you can ask me again.