Getting above 50 mph on a speedboard is not difficult. I live in Oregon, and there are plenty of hills where we are able to get close to 60 mph on. It is not difficult to do as long as you have the right gear (lowered, super-stable board and motorcycle leathers).
If you've been doing DH for years, then I am surprised you think 50+ is near impossible. Kevin Reimer has gone 72 mph standing up, and although that is the unofficial record, there are many others of us who have gone similar speeds. My personal best is 62.6 mph according to the GPS I was wearing.
If you've been doing DH for years, then I am surprised you think 50+ is near impossible. Kevin Reimer has gone 72 mph standing up, and although that is the unofficial record, there are many others of us who have gone similar speeds. My personal best is 62.6 mph according to the GPS I was wearing.