Originally Posted by
Love_Bikes
I am 5'9", so rode 54" CheckPoint. With 52" frame, as I could rest both of my feet on the ground. But the LBS Technician recommended size 54" Frame (with 54" I am barely touching the ground).
I have a 2018 Checkpoint SL5, and a 2018 Checkpoint ALR5. I am 5'9", with a 30-inch inseam, and the 54 cm frame fits me perfectly. I would suggest that you NOT make your decision for a 52 cm based on being able to rest both feet on the ground. That means the bike is not tall enough for you, in my experience.
When Trek dealers discount their bikes, my observation is that they usually do so at "end-of-season" in July to October on the current year's models (would be 2019 now). You aren't likely to get any discount on 2020 models until next July or so.