The metric or SI (Le SystÃ¨me International d'UnitÃ©s) system of units has many derived units from the seven base units. A derived unit would be a unit that is a combination of base units. Density would be an example where density = mass/volume or kg/m3. Many derived units have special names for the properties or measurements they represent. This table lists eighteen of these specialized units along with their basic unit factors.
Cadence (cycling) In cycling, cadence (or pedalling rate) is the number of revolutions of the crank per minute; this is the rate at which a cyclist is pedalling/turning the pedals. Cadence is directly proportional to wheel speed, but is a distinct measurement and changes with gearingâwhich determines the ratio of crank rpm to wheel rpm.
Preload is how much youâre compressing the spring from itâs normal length with nothing on it. You want to set preload to get the correct amount of race sag. Race sag is the difference in bike height from a bike on a stand with a fully dropped suspension and a bike with the rider on it.You want to aim for 3-4â of race sag on this bike. This gets your suspension near the center of its amount of travel (stroke).ace sag is the difference in bike height from a bike on a stand with a fully dropped suspension and a bike with the rider on it. You want to aim for 3-4â of race sag on this bike.