Originally Posted by JiveTurkey

The 7000 uses Shimano "V-brakes" or generic "direct pull brakes."

Is just one side rubbing? If, so then you can adjust how close each arm sits from the rim. On the side that rubs, locate the little tension screw on the base of the arm near where it pivots. Turning this screw in will increase the spring tension and make the arm sit further away from the wheel. Give it a quarter- or half-turn at a time then squeeze the brake lever a couple times and check. Be aware that making one side go further from the rime will make the other side get closer. You want to adjust either or both screw until the rim is centered between the two pads.

If both sides rub, then either it's set up too tight or the wheel is too out-of-true. Does one side rub, then the other, then it repeats when the wheel rotates? If so, it's out of true. You may need to true it. Or, if you feel like you can just make both pads further, then see below.

If you just need to make both arms go further from the rim, then you need to make the cable longer. This is done by actually making the housing shorter. At the brake lever, you should be able to turn a bolt where the cable exits clock-wise. This screws the bolt in, effectively shortening the cable. There is likely a locknut on the bolt. This needs to be loosened before adjusting the bolt, then tightened after to keep the bolt from moving.

Don't make the cable too long, or else the brake arm will bottom out against the handlebar before full braking power is realized. If you've opened up the arms as far as possible, but you're still getting rubbing on both sides. It's likely that the rim is too far out of true.

Also, make sure the pads are actually rubbing on the rim and not the tire.