Bike Posture Comparisons (Good Vs. Bad Posture) May 30, 2019 12:59 Updated Follow Not signed in? Log into your Purple Patch account for full access to your education program for coaches and athletes. You need to sign in to view this page. Monday, July 18, 2016 This video highlights good versus bad bike posture and elements to watch for. Related articles The Value Of Good Bike Posture What are the Purple Patch training zones?