Never been to Tri-health , but I spin just down the Road at the Blue Ash Y. All their bikes have SPD on 1 side and toe cage on the other. Definitely bring water. Most people wear bike shorts, it's more comfortable. Don't bring music, your instructor will play loud music designed to motivate you. Prepare to get your butt kicked ! Start with a beginners class just to get the feel of it. I spin with a friend who just rode the Paris Brest Paris 1200k and he gets a good workout from a 45 minute class.