Not measured but they are 26mm Gravel Kings front and rear. Rims are wide but not madly. Front is at its absolute limit. Reckon there is some wiggle room on the rear though, could sneak a 28.
Tight clearance on guards looks nice IMO, you will only know about how effective it is for side splash once you ride it in wet. Sram has a made a point to print graphics on that rival crank to make it look bad ..
HUNT wheels look nice! What tyre width have you gone with and what do they measure at their widest on the rim? Mudguard looks toight!