Weightweenies Rejoice - Justification for our Obsession!
Posted: Wed May 05, 2004 1:54 pm
I found this on 53x12.com Michele Ferrari's training site
"1. Light weight: It’s easy to understand what a determining factor the weight of your bike can be when you ride uphill: the force of gravity becomes the cyclist’s principal obstacle.
In truth, weight is also important during accelerations, not only for the obvious ones when you bolt from a group in an attack or to go into a sprint, but also for the ‘micro-accelerations’ that occur with every uphill pedal stroke, especially at reduced speed and pedal cadence.
Five hundred grams saved on the weight of the chassis and non-moving parts translate into an advantage of about 30” for every hour of climb; an even more determinant factor is the weight of wheels, crankset and pedals: every 100 grams saved correspond to an average gain of 20” per hour of climb.
The rotational inertia of the crankset, wheels, and pedals resists every angular acceleration of these same moving parts, with an added energy cost depending on their mass."
Pretty significant if it's accurate.
"1. Light weight: It’s easy to understand what a determining factor the weight of your bike can be when you ride uphill: the force of gravity becomes the cyclist’s principal obstacle.
In truth, weight is also important during accelerations, not only for the obvious ones when you bolt from a group in an attack or to go into a sprint, but also for the ‘micro-accelerations’ that occur with every uphill pedal stroke, especially at reduced speed and pedal cadence.
Five hundred grams saved on the weight of the chassis and non-moving parts translate into an advantage of about 30” for every hour of climb; an even more determinant factor is the weight of wheels, crankset and pedals: every 100 grams saved correspond to an average gain of 20” per hour of climb.
The rotational inertia of the crankset, wheels, and pedals resists every angular acceleration of these same moving parts, with an added energy cost depending on their mass."
Pretty significant if it's accurate.