Departed at 8:36 am from 53rd Street Chiro One. Rode with Dr. Tom, Jason & David. Sunny & cool day. We headed north on the LBP. Jason & Tom immediately began to push the pace 20 mph+. I worked to keep up while on the LBP. Dave dropped off before we reached Foster. We headed west on Foster and took several twists & turns and picked up the beginning of the NBT. We took the NBT to Skokie and headed east on Church and South on Dodge back to the LBP. I burned a lot of energy riding Jason's pace and began to tire by the time we reached the return trip on the LBP. Told Tom I would meet them at the coffee shop on 53rd street. Rode a modest pace the remainder of the ride which accounted for the drop in overall average speed. I enjoyed the push. It was nice to ride with stronger riders. It pushed me to a Strava suffer score of 183 with a 72 hour recovery window. All in all a great day.