Power Need for Avg Speed
This is a guide for some approximate cycling power figures for various speeds in cycling:
Speed - kmh (mph) Power (watts) Increase in power needed to increase speed by 2.5kmh
20.0 (12.5) 75
22.5 (14.5) 95 20
25.0 (15.6) 120 25
27.5 (17.2) 148 28
30.0 (18.7) 180 32
32.5 (20.3) 218 38
35.0 (21.9) 262 46
37.5 (23.4) 311 49
40.0 (25) 366 55
Figures assume a flat road on a windless day. The exact figures will change according to rider and bike weight, air temperature and position on the bike but the principle is the same and the figures are quite similar.