Liam achieved a top speed of 31 knots according to his GPS data and set an average speed of 26.92 knots over a 500-meter distance according to the official speeds measured by the Luderitz Speed Challenge team which system is approved by the WSSRC. For anyone thinking of attempting to break this record, here is what Liam has to say:"This is a new sport and itโs growing really … [Read more...] about Liam Dunkerbeck Speed Record in Wingboarding