An ampere hour or amp hour (symbol Ah; also denoted A⋅h or A h or A/h) is a unit of electric charge, having dimensions of electric current multiplied by time, equal to the charge transferred by a steady current of one ampere flowing for one hour
Auto Cycle Union (ACU) is the largest organisation for all forms of Motorcycle Sport in the UK.
The only indication that a helmet is suitable for immediate use in motorcycle sport is the ACU gold or silver sticker firmly affixed. The ACU Gold Approved standards is the minimum standard for Road Racing, Sprints, Drag Racing, Hill Climb and any speed events held wholly or part on bound metalled surfaces.
The aspect (ratio) of a tyre determines the tyre wall height in relation to the tyre width as a percentage (%)
