Eclat onyx 3pc spline drive cranksthe onyx cranks from clat are our finest and the most inventive crmo cranks to date last year they had a serious makeover in the shape of a 24mm spindle a spline drive only version and they now use a regular 3 piece design the arms still use the same invest cast boss design at the spindle and pedal ends we have also updated the welding for improved strength these cranks are designed to take the strain stress and power of todays most fierce riders feature