Would love recommendations for the purchase of my first bike. I am 67 and have just entered by first Tri. I need to purchase a bike and am sooo confused by it all. I am fairly athletic (work out every day) but the spinning bikes don't require balance!! I am looking at a Trek Hybrid 7000WSD and 7100 WSD. Should I look at a Road Bike or comfort bike or cyclobike. So confusing!!