Mudguards

Late reply; I have done all this nonsense. And yes CJF is right, sizing down tyres is easiest, cheapest, fastest solution. I did not accept this so I:

1. Bought wider guards
   
2. Bought a diff frame (the brake bridge placement matters)
   
3. Bought calipers that have better clearance (VO)
   
   

And gained 3mm, went from 25c to 28c.

It also looks like you have sliding dropout, play with that, fenderline is important to get more clearance.

Mine are on a fixie with track ends so with chain length and axle placement its very 4D chess.