New Bike. Lock info needed :)

Hey everyone, been lurking these forums for ages but have only just signed up (so I guess this is somewhat of a hello too!). Back in December I finally decided time is time and I went out looking for a bike. Ended up ordering a Giant Defy 1 & a whole 2 months later it has arrived!

I was just wondering, is a Kryptonite Fahgettaboudit Mini lock big enough to lock my rear wheel and frame to a standard London bike post? I can't seem to find much info on the lock other than overall dimensions, which is no good as it's the inside space that is important! If anyone who owns a Giant defy & this lock and could give me any insight into this I would be very greatful, thanks!