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No Crybabies
11,684 Posts

With these assumptions, dropping 7 pounds would get you up a 10 km hill 54 seconds faster. Riding by yourself, not a big deal. On the tail end of a road race, that's HUGE.

<TABLE cellSpacing=5 cellPadding=0 width="50%"><CAPTION>Benefit From Less Weight
</CAPTION><TBODY><TR><TD align=left>This Much Less Weight</TD><TD align=right>3.175</TD><TD align=left>kg</TD></TR><TR><TD align=left>Over This Distance</TD><TD align=right>10000</TD><TD align=left>meters</TD></TR><TR><TD align=left>On Hill of Slope</TD><TD align=right>0.05</TD><TD align=left>Decimal</TD></TR><TR><TD align=left>Faster by</TD><TD align=right>54.80</TD><TD align=left>s</TD></TR><TR><TD align=left>Ahead by</TD><TD align=right>307.58</TD><TD align=left>m</TD></TR><TR><TD align=left>Frontal Area</TD><TD align=right>0.5</TD><TD align=left>m^2</TD></TR><TR><TD align=left>Coefficient Wind Drag</TD><TD align=right>0.5</TD><TD align=left>Dimensionless</TD></TR><TR><TD align=left>Air Density</TD><TD align=right>1.226</TD><TD align=left>kg/m^3</TD></TR><TR><TD align=left>Weight Rider & Bike</TD><TD align=right>75</TD><TD align=left>kg</TD></TR><TR><TD align=left>Rolling Coefficient</TD><TD align=right>0.004</TD><TD align=left>Dimensionless</TD></TR><TR><TD align=left>Power</TD><TD align=right>250</TD><TD align=left>watts</TD></TR></TBODY></TABLE>
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