Ergon TP1 - Glossary

5150 ERGON BIKE ERGONOMICS
be correspondingly adjusted.
– Sample Movement: The way in which someone would ideally move, regardless of
their height, build, weight, posture, muscle mass, and other factors
– Torque: The amount of force required to tighten something
– Valgus Leg Build: The legs do not meet at the knees when the feet are placed
together
– Varus Leg Build: The knees are able to meet, but the feet do not
Glossary
– Achilles Tendon: Transfers the movement of the calf muscle to the foot. It is located at
the back of the foot and runs up to the calf muscle
– Big Toe Joint: The joint or knuckle between the bones in the foot and the big toe
– Biomechanics: The scientific term given to the way that a persons joints and muscles
work together to produce physical movement
– Bottom Bracket (BB): The bottom bracket is where the cranks attach to the bicycle.
It is the bearing housing (BB Shell) or can be the bearings and axle itself
– Cadence: The speed at which you turn the cranks measured in RPM
– Calf Muscle: The muscle at the back of the shin which stabilises and controls the foot
– Centre Point (Power Centre): The middle part of the foot that is capable of transferring
the most power to the pedals
– Cleat: The small plate used to engage the mechanism on clipless pedals
– Crankset: The collective name given to the crank arms, chain rings
– Dominance: A side of the body or a limb that is stronger and therefore favoured or
dominates the other side
– Efficiency: The amount of effect that something has in relation to the input
– Ergon Reference Point sticker: Labels to mark the reference points on your shoes.
Allow for easy reading of the scale
– Foot Angle: Closely related to Rotation. This is the angle of the foot on the pedal
– Foot Arch: The foot’s structure has two arches, one length ways on the foot and one
width ways. The arches are the reason that there is an optimal position for the cleat
on your foot
– Leg Axis Variation: See Valgus or Varus Leg Build
– Leg Axis: The line made when the hip, knee and ankle are lined up
– Q-Factor: The inclusive width of the cranks. On older systems using square taper this
can be determined by fitting both cranks pointing in the same direction and measuring
them outside to outside
– Rotation: When standing your feet are slightly rotated from pointing straight ahead.
This is rotation. Rotation is different when standing as to when cycling and needs to