Going from 20 watts to 10 watts implies a 50% reduction in Crr. This would be a massively noticeable change.
You'd go from 11 mph to around 13 mph if everything else is "normal"
On my recumbent at 30 mph, I need 300 watts of which about 55 watts are rolling resistance. Cutting the rolling resistance in half would increase my speed by just around 1 mph.
Last edited by GhostRider62; 07-24-21 at 12:19 PM.