Timeline for new saddle

so my current saddle is needing to be replaced. i have IM TX coming up on May 18th.

My question is: what’s the minimum amount of time/miles/long rides I should have on a new saddle before the race?

Highly depends on if the new saddle shape/design is identical to that of the old saddle, or not.

my current saddle is the Profile Design tri stryke saddle and I will more than likely replace it with the ISM Adamo Prologue
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my current saddle is the Profile Design tri stryke saddle and I will more than likely replace it with the ISM Adamo Prologue

I’d say at least 15 hours of saddle time prior to the race. It takes some people that long just to get used to the Adamo.