probably the reason why the previous owner changed to smaller rims was for the comfort

smaller rims = thicker, higher profile tyres...
this helps to soak up the bumps on the road

now, if u dont mind a bumpier ride, more expensive tyres and easier to bend rims, u could try going back to 14"
if i were you, i'd stick with the 13", hehe


bigger rims + thinner, lower profile tyres help with cornering.. but i doubt ur turning your kenari into a track car, rite? cheers