-
dependent on the organiser and how much of a stickler
Bit unfair, riding without mudguards particularly when the weather is bad is pretty annoying for other riders too, spraying other people with road crap, going into controls covered in crap and leaving a mess etc.
Some rides due to location will rely on good relationships with the controls they use, people going in caked in mud and leaving a mess all over their nice cafe will not help that.
-
I tend to ride by myself.
I'll be doing the flatlands and the chance of rain is not high. On a 600km you can't ride at some one else's pace. I certainly won't. Last weekend for the invitica 400km I was mostly on today and that was fine. Many had no guards and I wish I did as it rained but there is a steel bolt stuck in my ti frame preventing the mounting of guards which were removed by the young man who stole the bike earlier this year. I will kit fit race blades. Id rather not do the ride.The other bike with guards can't take my beam rack without a seat post change. It also is not as comfortable due to the saddle for a 600km.
I'll just do it without guards. If anyone says anything they'll get an ear full.
Mudguards are dependent on the organiser and how much of a stickler they are, theoretically they could refuse to validate your Brevet card. .