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.
- Proper Spring Rate and Sag-Your springs hold up the rider and bike so make sure you have the proper rate spring in your bike. Most bikes work best with 95-115mm of sag when the rider is on the bike. bike with too much air in the tires will be harsh and deflect off obstacles while an under inflated tire will distort under load and not give good rider feedback. Use 11-13 psi for motocross and 13-14 psi or more for off road to prevent flats.