Functional bikes. Not Porn not Anti

Found it;

This new Genesis is running 650b wheels with 47mm WTB Horizon tyres - the final bike will have space for 50mm tyres. To accommodate the tyres the Genesis designers have had to drop the chainstay out of the space between the tyre and chainset, in s similar fashion to the Open UP. This move also helps to keep the chainstay length reasonably short. Fit bigger tyres and you have to lengthen the chainstays to provide clearance and dropping the chainstay is a neat solution.