I plan on completing my 1st ironman race next year and now seems to be a good time to purchase tri clothing discounted.

i do have a once piece tri i've used on my sprint, olympic, and 70.3 races this year and i loved it.

it doesn't ride up like my bike jerseys do.

Are there concerns about a one piece in an ironman? top riding up during the bike leg?

i see the pluses of a two piece is to change out of the shirt for the run quickly and of course to poop if you need too. Getting in and out of a one piece is a pain.

Thoughts?