My back tire is pretty squared off with some shallow nicks and cuts, and I just got my first flat in about six months on it this morning. The tire is definitely on it's last legs. I've got a race this Sunday (3 days away), and I just got a P3R in the mail yesterday that I can put on the back. I'll be going on an easy recovery ride tomorrow and a decent ride with a couple sprints on Saturday. I'm afraid of flatting again during the race, however, I want to make sure the tire is "ready" to race on (a crit).
So, how long is your 'buffer period' before you race on a new tire? Is a two-day-old tire not yet ready?
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