Looking for a new ride. I like the new endurance oriented machines. I just test rode both of the mentioned bikes. 35 miles on the BMC and 65 on the Trek, many of the same roads. What I noticed was that the BMC seemed to absorb small bumps and vibrations much better than the Trek, but the seat tube pivot helped the Trek on bigger hits. I am wondering if the small bump absorption of the BMC was due more to it having 28 mm Contis on it than it was due to the frame kinks. The Trek had 25 mm Bontrager R3s. The BMC had Easton EA90 wheels vs Racelites on the Trek. Unfortunately I do not know the inflation pressures of the tires. Neither was tubeless.

I also noticed the Trek was snappier on acceleration, but again, I am wondering if this was due to lighter wheels vs a stiffer chassis.

Both bikes were great rides. Hoping the experts can shed a little light on my observations. And please, no Trek hater comments, I am just interested in opinions of tires vs frames on my ride observations. Thanks.