Gear outer used for brakes would provide better braking - until it split when you hauled on the brakes really hard.
It's a hybrid, right? Lots of these come with a 'power modulating' device, intended to stop numpties sending themselves flying over the bars. Which works by making the brakes crap, so you hit things instead. They should all be removed and destroyed. (checks specs - yup, the crossroads sport has one of these. That'll be the problem).
FWIW I agree disks would be overkill for this sort of bike/use.
Oh yes - Richard, if it's got them, ditch the shimano pads and fit something else if you want your rims to stay alive more than a couple of miles. Koolstop salmon are recommended, although I find aztecs ok.
cheers, clive