Knowing that you tend to ride on the fast side I wouldn't. It does depend on how bad the crack is tho. I have known guys to ride on cracked frames for extended periods. They typically just keep a close eye on the crack to make sure it isn't getting worse. Steel doesn't usually fail catastrophically but tends to slowly get worse over time. All that being said not riding for a week or so...while sucking mightily... is nowhere near as crappy or expensive as dental work and root canals.