That was a great idea to compare the sizes on the website. It looks like Specialized and Trek dont size their bikes exactly the same. The 54cm Trek seems to be right between the Med. and the Lar. Cross Trail. I am going to go test ride the Cross Trail and see. I am liking the Pro Disc more and more but the Comp is $800.00 cheaper. Thats a pretty big jump for components on a hybrid. I do like the idea of the remote lock out feature on the Pro as well as the adjustable stem. I am really looking for the fastest and most aggressive of the 2 bikes. Looking forward to test riding them.