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Rusty Underdog Performance Shortboard

The Underdog is a collaboration between Caio Ibelli and Rusty Surfboards shaper, Pedro Battaglin. The Underdog is Caio's favorite high-performance board for competition on the World Surf League tour, designed for versatile conditions and powerful waves. Underdog excels at quick tight turns and power moves.

The Underdog has a deep single concave with aggressive nose and tail rocker. Underdog's high-performance rails are low, medium apex and sharp for maximum attack. The aggressive outline features a narrow nose and round tail to keep you connected in hollow sections and in the pocket. Foil (spread of volume) is especially pronounced with a thinner nose than tail, to free the nose and allow quicker pivot. Underdog features a thruster fin setup for reliable drive, stability and control. This board is designed for intermediate to advanced surfers in 2 ft. to 8 ft. surf. Everyone loves an Underdog! 

Caio rides the stock 5'9" (18.38" x 2.30" x 25.5L). Dims available in Standard and XTRA sizes for added volume.

*Logo positioning might be different from the image.

Caio Ibelli 's favorite high-performance board

Wave Size

  • Small
  • Head
  • Double

Conditions

  • Mushy
  • Steep
  • Barrels

Approach

  • Cruisy
  • Power
  • Vertical

Experience

  • Beginner
  • Confident
  • Progressive

Foot Position

  • Front
  • Middle
  • Back

Rails

  • Soft
  • Medium
  • Hard

Nose Shape

  • Pointy
  • Blended
  • Round

Tail Width

  • Slim
  • Medium
  • Large

Entry Rocker

  • Relaxed
  • Moderate
  • Aggressive

Exit Rocker

  • Relaxed
  • Moderate
  • Aggressive

Agressive rocker for maximum attack

The Underdog has a deep single concave with aggressive nose and tail rocker. Underdog's high-performance rails are low, medium apex and sharp for maximum attack.

For versatile conditions and powerful waves

The aggressive outline features a narrow nose and round tail to keep you connected in hollow sections and in the pocket. Foil (spread of volume) is especially pronounced with a thinner nose than tail, to free the nose and allow quicker pivot.

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Stock dimensions and volume

Length Width Thickness Volume
5'5" 17.86" 2.1"
21.51 L
5'5" Extra 18.85" 2.39"
25.5 L
5'6" 17.99" 2.15" 22.51 L
5'6" Extra 18.98" 2.43" 26.5 L
5'7" 18.12" 2.2" 23.51 L
5'7" Extra 19.11" 2.47" 27.5 L
5'8" 18.25" 2.24" 24.5 L
5'8" Extra 19.24" 2.5" 28.5 L
5'9" 18.38" 2.3" 25.5 L
5'9" Extra 19.37" 2.54" 29.5 L
5'10" 28.51" 2.35" 26.5 L
5'10" Extra 19.5" 2.57" 30.5 L
5'11" 18.64" 2.41" 27.5 L
5'11" Extra 19.63" 2.6" 31.5 L
6'0" 18.77" 2.42" 28.5 L
6'0" Extra 19.76" 2.63" 32.5 L
6'1" 18.9" 2.45" 29.5 L
6'1" Extra 19.89" 2.65" 33.5 L
6'2" 19.03" 2.48" 30.5 L
6'2" Extra 20.02" 2.68" 34.5 L
6'3" 19.16" 2.51" 31.5 L
6'3" Extra 20.15" 2.7" 35.5 L
6'4" 19.29" 2.55" 32.5 L
6'4" Extra 20.28" 2.72" 36.5 L
6'5" 19.42" 2.57" 33.5 L
6'5" Extra 20.41" 2.73" 37.5 L
6'6" 19.55" 2.6" 34.5 L
6'6" Extra 20.54" 2.76" 38.5 L