Concave Reference

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Deck Concaves

FK1
A flat board, with some rocker and a kick tail. Maximum wheel base—29.0 inches. Non-symmetrical nose to tail.
Flat/FLT1
A flat board, with no kick tail. Maximum wheel base—30.0 inches. Symmetrical nose to tail.
K12
A double kick nose with extra deep concave that adds significant stiffness to a deck. This allows us to reduce a K12 deck’s thickness and weight without losing pop and response. It also features a steep, flat nose and tail. Maximum wheel base—14.50 inches. Non-symmetrical nose to tail.
K15
A double kick nose with deeper, smoother concave, longer wheelbase, concave kick on nose and tail and a scoop tail for a more secure foot placement without feeling trapped. A big boy version of the K12 allowing all terrain ripping with the stability of a longer wheelbase. Less wheel bite because the steeper concave goes out to the edge of the board. Maximum wheel base—15.75" Non symmetrical nose to tail. Consider this an upgrade that replaces the K10 concave.
K16
This is like the K12 with a shorter wheelbase for smaller skaters. Maximum wheel base—12.25 inches. Non-symmetrical nose to tail.
KXL
A kick tail longboard mold with mellow concave and slight kick in nose. Maximum wheel base—27.0 inches. Non-symmetrical nose to tail.
SP2
Spoon Nose II, A reissue of the classic Powell Peralta® Golden Age Mold we made the original Bones Brigade’s decks from. A spoon nose kick tail with slight concave on the kick tail intended for making 10" x 30" style decks. Maximum wheel base—17.25 inches. Non-symmetrical nose to tail.
SP3
Spoon Nose III, A reissue of the classic Powell Peralta golden age mold we made the original Bone Brigade’s decks from. A spoon nose kick tail with slight concave on the kick tail intended for making 10" x 30" style decks. Maximum wheel base—17.25 inches. Non-symmetrical nose to tail.

Powell Peralta Concave Reference

Name Nose/Tail Max Width Depth Angle/Tail Angle/Nose Radius/Tail Radius/Nose Max Wheelbase
SP2 Concave 10" 0.460 19º 9" 7.5" 17.25"
K12 Flat 7.75" 0.395 18º 19º 7" 7" 14.50"
K15 Concave 9.50" 0.45 21º 23º 10" 10" 15.50"
K16 Flat 0.38 21º 13º

Skate One Concave Reference

Name Nose/Tail Width (Max) Center Concave Angle/Tail Angle/Nose Radius/Tail Radius/Nose Wheelbase (Max)
K7 Deep 9.00" Shallow 20º 20º 6.00" 6.00" 14.75"
K8 Deep 9.00" Shallow 20º 20º 8.70" 8.30" 14.75"
K12 Medium 9.00" Deep 19º 20º 7.00" 7.00" 14.50"
K15 Medium Deep 10.00" Deep 21º 22º 7.00" 6.30" 15.75"
K16 Medium Deep 9.00" Deep 19º 21º 7.00" 6.70" 12.75"
K19 Medium Deep 9.00" Medium 20º 22º 6.30" 5.70" 15.25"
K20 Subtle/Slight 9.00" Medium Deep 18º 18º 7.00" 7.00" 15.25"
K21 Medium 10.00" Deep 19º 18º 8.30" 8.30" 15.75"
FK1 Flat 9.50" Flat 18º N/A 11.00" N/A 28.75"
SP3 Deep 10.50" Medium 22º N/A 12.00" N/A 20.75"

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