Friction Calibration

I set up a straight test strip between the living room rug and the polished oak floor to evaluate rolling resistance. The rug created unacceptable drag on my tires, dropping momentum immediately. Once I cleared the brass floor divider, the smooth timber offered near-zero friction. I aligned my tires along the grain to test straight-line deceleration, stopping exactly forty centimeters past the joint. It is a solid baseline for indoor transit.