All the records on the Monty site aren't really 'official' though, only recognised by the BIU I think. As far as Guiness records are concerned, they don't differentiate between wheel sizes, it's simply 'Highest bicycle bunny hop' (which officially was set by Dani Comas (Spain) when he cleared a bar at a height of 1.21 m on the set of Tous Les Records in Port Leucate, France on 23 July 2004). There's also a sidehop record which Martyn Ashton held for a while but I take it someone on a mod's smashed that a few years ago.