Well spotted! Thought I got away with that. I just upped the tyres to 28c and am struggling for clearance. It spins free but the little tyre noodles rattle on the guard.
Doesn't help that I hacksawed off the excess on the stays so have sod all adjustment...
The other option is that if you have a dremel on hand, take off both wheel, ensure bolt is nice and tight, then dremel the end of the bolt to allow a little more clearance.
That is simply lovely.
The rear guard need a spacer between the BB and mudguard to move it forward to allow more clearance on the rear.