I think you are correct. However, I would think that the small contribution in forward momentum caused by the rebound is trivial compared to the momentum carried by to ~200+ pounds that the rider and bike have travelling at even a few miles per hour. This is also where unsprung mass comes into play. The lighter the rear end, the faster it can react (the less momentum in the rebund).
Oct. 15, 2020, 8:55 a.m. - Hank Sola
I think you are correct. However, I would think that the small contribution in forward momentum caused by the rebound is trivial compared to the momentum carried by to ~200+ pounds that the rider and bike have travelling at even a few miles per hour. This is also where unsprung mass comes into play. The lighter the rear end, the faster it can react (the less momentum in the rebund).