The El Dorado is the most challenging balance trainer to date. It's designed to push the limits of traditional style balance board riding by featuring an aggressively tapered 5" diameter 'rock' for fast, responsive and super fun riding. When sitting down to design the El Dorado, inspiration was drawn from some of our original board and rock combos which Brew hand turned back in 1990. With the increased rock diameters and longer deck lengths, these early day set ups required significantly more intuitive balance skills thereby creating a more challenging ride. Well now with the El D's aggressively tapered rock, increased rock diameter, full grip tape surface concave deck and increased nose and tail length, the El Dorado meets the demands of todays intuitive balance board riders looking to push their limits.