Step 5: Removing the front wheel
Remove the front wheel by loosening the two axle nuts so it can fall out for the fork dropouts. Of course, you must first release the front brake pads, or the wheel will become stuck between the brake pads and the front tire. Letting out all of the air in the front tire will also work, but simply releasing the front brake pads is much easier.
As per Figure 5, press the brake arms together so the cable head can be removed from the brake arm slot (D). Also shown in Figure 5 is the cantilever studs (A), which have built in return spring so keep the brake pads (C) away from the rim when not in use. The brake pads can be adjusted for different rim style by moving them along the brake arm and then locking them in place with the brake pad bolts (B). Properly adjusted brakes should not rub on the rim when idle, but sit as close as possible to the rim.