I did my first crit recently (doing it again tonight) and I think I fuelled just right. I ate 2hrs before the event, drank 80g solution of PSP22 in the hour before the race/during warm-up and had half a bottle with a High5 tablet in it for the race.
What some have said is right, you don’t *need* fluid onboard for the race, but it’s nice to have and if you use an electrolite, you’ll recover better.
The most important advice I can give is to not think of it as a 45 minute event, think of it as 1.5hrs starting 45mins before the bell.
45mins will give you ample time for a good warmup – do 20mins gentle spinning then 3min race-pace sprints with 3-5mins recoveries in between.
And finally, NOTHING will prepare you for the pace of crits at this time of year! Sorry pal, but they’re **** brutal!!!
Good luck!