I am looking to buy a new tri bike (P2 SL) as my only bike. I typically ride alone, but I have read the warning of hill rides being better on a road bike…why? In a tri that has a hilly course, you’ll be on your tri bike, so why would it be harder to use during training? Besides not being optimal for group rides, what are any other cons of having a tri bike only? Is the soloist worth looking at?