I do them before every race because I only race 8-10 a year but I ride every weekend. I will do 70-100 miles every week. I like to crank down deep sandy washes all day mixed with some large whoops, helps the cardio and just fun as hell. In four years I put over 13,000 miles on my last bike.
I'm having a difficult time understanding the magnitude of this imagery. WOW! I don't even understand what I see. GuuuuhNarly dude, but I think they're fine for another season. Maybe 2 seasons.