speaking of tires and roll resistance...... I did not check the psi difference between the steel RLT and the RDO. Even though both were set up on grail wheels same G'one tire tubeless. I do recall the rep telling me when I took off on the RDO that the pressure was good for the road. not checking the pressure difference was probably a hindsight on my part as for comparing the 2 bikes. In my opinion, a lb or 2 can change everything on comfort.