Disc brakes or not to brake that is the quesion

Recently my disc brakes have gone from bad to useless. They are extremely
spongy and however much I tighten them up it makes no difference. It doesn't
matter how much pressure I apply. Jelly would stop me more efficently. I
have already once replaced the back pads (even though they wern't worn that
much) with the same make that was already on there and although it imporved
a bit for a while. They soon got worse again. I actually swapped them back
to the old ones about 2 days ago with a little improvement!

The discs seem clean enough and I have never tried to clean them in anything
other than water.

When I first got the bike they were great and stopped you smooth and
quickly.

Also if I go no handed at anything above slow my front wheel starts to
develop a small wobble which quickly grows into a vicous one that shakes the
whole bike. Yet there are no buckles that I can see in either wheels.

Could anyone point me in the right direction?

Thanks

Sie

Go to this address and search under "disc brake naysayers", http://www.phred.org/mailman/listinfo/framebuilders
i remember a thread going on over there talking about discs versus canti's. Have a look through, some one placed some information there about how disc brakes **** them selves over a certain amount of loading. may be usefull.

Cant find it now, thought i would see if i could find it my self but has dissapeared some where. It basically said that once discs had been past a certain amount of pressure they fail and that is it. Check your seals, sometimes they blow out after a severe braking otherwise go for a good set of canti's.