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Just my 2p, but guards should imo be set up with a smaller gap at the start of the wheel rotation ie at the rear of the wheel and a larger gap at the exit of the wheel ie the front. This is for two reasons.
1, any thing that gets picked up by the tyre can roll around with the tyre and not get trapped under the guard and possibly set you over the bars.
2, water also rolls back down the inside of the guard and not out the front. A little bit of tape inside the end of the guard also helps.
Close fitting guards look good, but are functionally suboptimal.
How big is the clearance between the guards and tyres in radial direction?
An image would also help.