I’ve read that the most important weight you can cut if you are a speed fanatic is rotating weight, including rotating weight on a 700c tire. This may be so if one considers only the trike. Trikes do nothing without an engine. My experience reveals the most important weight one can cut to increase performance on a speed trike is the engine’s weight, in other words, the pilot’s bodyweight. Theories of physics suffice only so far as fascinating topics of intellectual debate, but out on the road, the power and efficiency of the engine will ultimately determine the performance of the machine, not whether one runs a certain tire or wheel on a trike. ‘Nuff said – see ya’ On the Pavement!