Would Tri-Bars be advantageous for a 260 mile 2 day event
I would suggest attaching the bars and doing some test rides.


Is your bike, with it's aggressive geometry, stable when using them?
Are you comfortable using them?
Does this new position provide some relief, or is it just more annoying?


I think you're the only one who can determine if they'll be an advantage to you. In general, I'd think the extra position would be an advantage.

Even with 4 positions on your standard drop bars, being able to take weight off your hands and put it on your elbows might be a welcome relief, even if it's just for a short period of time.