Recently booked to do the Nubian sailtrek followed by the Siwi Oasis trip. Looking forward to all of it but............. there's a bycle tour of the old city. I was a deprived child (lived in a shoebox etc!) and was never bought a bike. I'm too embarassed to confess that I've reached the ripe old age of ** and can't pedal a bike. I have just 4 weeks to learn. Any suggestions. I had thought of crying Rameses Revenge that day and doing it on foot? Any other bright ideas?