Hi. I had a problem with both of my brakes (V-type cantilevers) where they were too close to the rim causing the wheel to hit the brake pads. Firstly I tried to rectify this by screwing in the adjusting barrels. However, they were screwed in as far as they could go. So then I loosened the cable tension at the clamp nut (I think that's what it's called, it's the last bit that cable goes through). This solved that problem but it created a new one because now the brake levers are very loose and have to be pulled very firmly to activate the brakes. I think this may be because the brake cables are too long. I will post a picture later, however I'm having internet problems at the moment. Does this sound like the cause of my problem? Thanks.