Surfboard Tail Design

Surfboard Tail Design

What is the difference between Surfboard Tail Designs?

Surfboard tail design has gotten a bit more complex as surfboard designs have multiplied. The surfboard tail influences hold and release on the surface of the wave.

A good rule of thumb is to think of a more angular tail as creating more angular, square turns. A rounder tail will create more elliptical, smoother turns. As Rusty Preisendorfer said in a Transworld Surf article: “You start splitting hairs when you’re talking about a rounded squash versus a squash, but I like to tell people that basically an angular tail creates a more angluar turn.”

There are two basic tail designs: the pintail and the square tail. All other designs are variations on these two themes. Generally a narrower tail will hold the wave better but sacrifice turning ability and speed. Gun type surfboards designed for big waves have a long pointy tail designed to hold on the face of the wave, effectively digging into the water to maintain stability and direction. A rounder, pulled in (shorter) tail will not dig into the wave so much and will allow for greater maneuverability and speed, but less hold.

Surfboard tail designs need to work together with the shape of the board and the individual aspects of each surfer for the best result. When thinking about what tail would be best for a certain board you have to think about the general outline, type of waves you’ll be surfing, what you want out of the board, etc. For instance, if you’re a smaller person who is just starting out, you won’t want a pintail, but a round tail may be just the thing.

Tail Designs

Pintails – Pintails are designed to provide maximum control and surface hold on the wave. They have minimal surface area and come to a point at the end with little curvature. This decreased surface area decreases the lift on the tail and allows the point to dig into the face of the wave, causing the board to “track” or maintain direction. Pintails are used almost exclusively on big wave gun surfboards, where control is the most important element. Pintails are not so maneuverable, but when you’re speeding down the face of a 20′ Waimea bomb it is more important that the board go straight and not suddenly start snaking all over the place.

Roundpin Tail – This surfboard tail design is a more versatile version of the pintail with a bit more width and curve. It is the halfway point between round tails and pintails, ideal for medium sized surf, anywhere from shoulder to almost double overhead. Softer curve coming to either a point or a rounded point. This tail design provides a moderate reduction in surface area to maintain control, however it is not as extreme as the pintail. Roundpin tails have less release and create smoother, more drawn out turns. This tail can be found on a variety of boards from shortboards and hybrids to longboards.

Round Tail – This is a smoother continuation of the board’s contour, coming to a rounded end. The increased surface area helps give the board a bit more lift in the rear and allows for a looser, more turnable board. These are popular on shortboards where maneuverability is key. A round tail will provide more release off the top of a wave than a squash or swallow tail, however it makes square turns off the bottom or mid face a bit more difficult without a corner to work with, such as exists on a squash or swallow tail. Round tails help direct the water around the end of the board and provide more stability in hollow, fast surf.

Squash Tail – Very responsive, the squash surfboard tail design provides all the surface and planing area of a round tail, contributing to speed and lift and helping to maintain speed in slower spots. The rounded corners provide a bit more bite and control than the round tail, and the square end allows the board to release. The corners allow for more pivotal, abrupt turns off the bottom or on the face, but will provide less release off the top. This tail design relies on the tri-fin setup to maintain control. The squash is the most popular tail for a shortboard.

Swallow Tail – The swallow tail is related to the squash tail in that it provides more surface area from rail to rail, allowing for planing speed and lift. The tail of the board curves down to two points as in a squash, but the area between those points is decreased by a vee cutout resulting in two soft points. The decreased area between the corners and more pronounced points give the board more “bite” and control in critical maneuvers, as well as when going into and out of turns. The two points on the swallow tail act sort of like dual miniature round point tails, but without the pronounced “tracking” that a pin or rounded pin provides. The swallow tail is generally good for small waves, but it also is good for surfers who want a board that’s going to stick during deep carves. Fish type surfboards tend to have a pronounced swallowtail, compensating for the wider, straighter outline which is more difficult to maneuver.

Bat Tail – (sometimes called a star tail) This is rare surfboard tail design. It’s a version of the swallow tail and essentially performs the same way. Helps keep the tail wider so the rails can run straigher down the length of the board. The bat tail is essentially just a cosmetic difference, as it is extremely difficult to percieve any difference between the Bat, Diamond and Swallow. Some say that the center point of the bat tail adds a bit more stability.

Diamond Tail – The diamond tail is a lesser used tail design now that the squash tail has become more popular. The original intent of the diamond tail was to soften up the square tail but keep some of its speed.

Square Tail – The square tail is like the squash, but the pointed corners create more square turns with less release and more bite.

16 thoughts on “Surfboard Tail Design”

  1. thanks, this helped a lot today. i bought a new ci surfboard. went in knowing exactly what i wanted, and walked out with it.

  2. is there a thumb tail? i got a secondhand xanadu shortboard from a friend and the tail looks like a thumb and he said it was a thumb, its like a skinny round tail but not too pointy like a round pin

  3. Really informative. i always thought it was the other way around. i thought pintails were looser and square were more stable.

  4. I am confused with the names. What is the difference between a Roundpin Tail and a rounded Squashtail? I think I have a rounded Squashtail on my 6.3 shortboard, but actually it looks also very similar to the rounded Pintail on this site? Are these names synonyms for the same Taildesign?

  5. There’s a bit of blur between the divisions of tail designs. You could have a wider rounded squash, or a rounded squash that could possibly look like a rounded pin. Usually a squash tail is a bit wider with a flatter area like in the pics above. Do you have a picture of your board?

    1. Thanks Hayley. I have a student who wants to reference you for a project. Are you the author of this article?

  6. thx i used it for a school project thx helped alot i like the bat tail reminds me of batman
    cn sum 1 recommend a good beginner board but not a soft foam one i find that they are slippery

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