Weight-concept: Sports equipment is not included in the free baggage allowance.
Following flat fees apply for the transport of sports equipment in any case:
continental flights up to 15 kg: € 20 one way.
intercontinental flights : € 40 one way.
The piece concept is applicable to all flights to/from USA, U.S. territories, Canada and Mexico. Generally, sports equipment is within your free baggage allowance, provided it does not exceed the maximum weight and maximum dimensions.