Disk brakes not working then are?!

[Edwin Watson]

Hi Guys

 

A few weeks back I had my Avid Juicy 5 breaks bled at my LBS,Since then I have gone on about 3 rides about 20KMs each(So not a lot at all) the breaks were not as sharp as before but they worked well and to be quite honest were a bit to sharp before.

 

But slowly my back brake seemed to not work as well. Then last week I went for a ride and my back brake would hardly work, in fact I could pull the brake all the way down hitting the handle bar and it would hardly slow down my bike. I was left having to ride with my front brake only which wasn't fun.

 

Once I got home I took ride around the block to try make out what could be the problem only to find that my back brake was working again?! Does this make sense to anyone?

 

I don't know much about Hydraulic disc brakes so I dont know if this is a common problem or what? I just don't understand how when I was riding down single track the brake seemed to be totally pointless then once I got home seemed to be fine.

[Jabawakee411]

My friend has a similair problem. If you store your bikes vertically its beacause all the oil goes out of the lever. Bit if ot then I dont know what the problem is.

[Mecnic]

There is air somewhere in the system

 

The brakes need to be re-bled, properly, what can happen is air is trapped in the darkest corners of the system and works its way loose when you ride again entering the hose.

 

As the above post stated when stored vertically air rises to the highest point usually in the hose just before the lever I had that problem and a qick bleed sorted it out.

[Genesis]

May be a real flyer - but are you sure your rear brakes were not overheating and causing there "stopping power" to fail.

 

They might have "cooled" down when you took the bike for the test ride.

[DawieO]

Air in the brakes. Blead them properly.

[gummibear]

I have Juicy 5's and have been riding about 18 months with them and never had a problem.

Last week i changed the pads and since then they are like abs brakes.They bite and let go,no continuous braking.

I have bled them twice in the week that helped a little and even put original pads back and still same problems.

I rode this morning with my other wheels with Aligator rotors and still same fading.

I am going to buy more dot oil tomorrow and will bleed them again,and see how that goes.Maybe water in the oil or something.

[manbearpig]

My friend has a similair problem. If you store your bikes vertically its beacause all the oil goes out of the lever. Bit if ot then I dont know what the problem is.

Is that jabbawakee speak?