Mudguards

Pushing the cross section in, increases the side profile radius.
I've been fucking around with different sets all this time. Don't know if repeat adjusts will cause issues. But I fit my 650/50mm perfectly around my 700/38 tyres.

It fatigues the metal the more you do it, often resulting in a sudden compliance that gives you a nice kink in the fender. Not the end of the world, but can definitely compromise a clean aesthetic.