hi alis, lucky you!
do you mean a motorbike or a push bike? wouldnt like to go up those hills on a pushbike!!
we hired a motorbike from the little shop next door to vavillas supermarket (cant remember what it was called) the have lots of mopeds, but they got a 125 trial bike for us from st george, only took about 30 mins, we called in on the off chance and within an hour we were zooming around the area! i think it was about 23 euros for the day, hope this helps
ger x