I have a BH Rebel Gravel X Yamaha mid drive gravel bike that came with Schwalbe G-one 700 x 40c tires which have no flat protection and a max inflation pressure of 70psi. I wasted almost $100 on Tannus Armour inserts with tubes. Took them out because of what I felt was excessive additional rolling resistance. I initially thought there was something wrong with my Yamaha drive because performance degraded so much with the inserts. So I decided to try some thinner higher pressure tires that had flat protection and ended up with Continental Gatorskin 700x32c and a max inflation pressure of 102psi. Huge difference. Yesterday I took a first ride, 42 miles with ~1400 ft elevation gain. I often run with the assist off and at times thought I was still riding with assist on. With assist on it was almost as if I was riding in a full level higher than what I was in. The ride was still pretty good but definitely harsher over railroad tracks. I might have use for the Schwalbe gravel tires in the future but for now they are on the shelf along with the Tannus inserts.