If your brakes are squealing a bit then you need to toe the the pads in a bit. Basically the trailing end of the pad needs to touch the rim when barely when light pressure is applied. You want your pads to be adjusted like an inverted V or sorts. Like this ^ . You need to adjust and re tighten the brake pad holder. Re-adjust the pads and they will be tight but will not squeal.
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Regards, Tony