bike tips and advice what is efficiency background

WHAT IS EFFICIENCY?

Efficiency is the tire's capacity to DELIVER THE ENERGY supplied by the cyclist in riding conditions.

Efficiency is expressed by the following formula: (energy delivered) / (energy supplied) = Efficiency.
As this formula always gives a result of less than 1, efficiency is therefore always expressed as a value between 0.00 and 0.99.

FOR THE TIRE PART, EFFICIENCY DEPENDS ON:

  • the nature of the rubber compound (presence of silica, ...)
  • the tread pattern
  • the density and construction of the fabrics (TPI, or number of threads per inch)
  • the architecture of the tire, the reinforcements, …
  • the quality of the inner tubes used (MICHELIN :Latex>UltraLight>AirStop>Protek)
  • the tire size (23>20>...)
  • the inflation pressure (8>7>6bars ...)
  • the tyre's rolling resistance


THERE ARE OTHER EXTERNAL FACTORS AFFECTING EFFICIENCY:

  • the nature of the road surface
  • aerodynamics
  • wheels and bearings
  • ...
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