Watch: Alex Knost Shoots A Flaming Arrow Into Your Stockpile Of Performance Shortboards

Live Now: Episode 3 Of Stab In The Dark With Kolohe Andino


Watch: Alex Knost Shoots A Flaming Arrow Into Your Stockpile Of Performance Shortboards

You ever wonder what a Twonzer is?

cinema // Jul 1, 2021
Words by Jack Mutschler
Reading Time: 3 minutes

When it comes to experimenting with obscure surf craft, Alex Knost is the guy. Like your buddy who just built a makeshift shaping bay in his back shed, Alex carves out midlengths, bonzers, and just about any other setup the mind can imagine.

However, the key difference between Mr. Knost and your friend is that Alex actually understands how the elongated boards work. Knost harnesses the ungodly amount of speed they provide and disperses or ditches it with carves, stalls, and cheater 5 barrels. Your friend, on the other hand, uses the extra board length to catch waves early and avoid eye contact with air sections.

Filmer Cole Walton recently sent us a clip of Alex doing a test run on his self-shaped twonzer and, naturally, I was intrigued. I shot Alex a few questions to try and make sense out of the cryptic fiberglass puzzle. See his answers below.

Did you shape that board in the video?
Yes, it’s a twonzer I shaped maybe 5 months ago. It’s the first one I made.

What exactly is a twonzer?
A twonzer has a twin fin set up with bonzer runners in front. The back twins are set super upright to eliminate surface area at the base of the fin. It compensates for all the base on the front bonzer runners. It’s loose but with a tracking feeling. Like loose trucks, but so loose you gotta avoid wheel bite.

Alex Knost

What was the inspiration behind it?
Photos of this Mike Eaton shaped “zinger” model were floating around online. Having primarily ridden bonzers over the past five years, I was intrigued by the design and wanted to adapt it to a longer board. Ideally, it was for smaller California surf. The goal was to make something that trimmed across flat sections using the bonzer concaves and the lift that they provide.  


It has just enough length to noseride but still utilizes every inch of the board. Since the fins are placed further up, you can place your back foot behind them and pivot at low speeds. For longer, drawn-out carves, you can put your back foot on top of the frontrunners and turn from further up on the board.

How does it ride compared to a normal bonzer? Or a single fin?
No center fin is new to me. It slides more, but I enjoy the new sensation. It’s a feeling that reminds you there are no rules in surfing—just a goal to utilize the surf in new ways.

Get any weird looks riding this? Any non-believers?
Probably. But, of all people, I saw Gorkin try it in Nicaragua. He had an ear-to-ear grin getting tubed on it. The mind works best when open.

What surfer would you like to see riding a twonzer?
This board? Not sure. Burch, maybe. But I made a new one that’s  5’8″ and looks like an ’80s kneeboard. I would like to see Creed, Ellis, Noa, Ozzie, Harry Bryant, Chippa, Justin Adams, or maybe Curren ride that one. Someone that can surf like Gonz skates.


Comments are a Stab Premium feature. Gotta join to talk shop.

Already a member? Sign In

Want to join? Sign Up


Most Recent

Watch: Harry Bryant And Dav Fox’s “Motel Hell”

Guzzle milk, hit play. 

Feb 27, 2024

7 BTS Full Frames From ‘Motel Hell’

"He got flogged on the takeoff and pushed into a underwater cave for a long…

Feb 25, 2024

This Week, 272 Surfers Will Battle Through 20 Rounds For 18 Remaining Olympic Spots

Your 2024 ISA World Games preview.

Feb 24, 2024

With Two Events Down, What Story Is The CT Leaderboard Telling us?

We plugged past and present Pros, and an official surfing odds setter, for their post-Hawaii…

Feb 24, 2024

John Florence Would Have Submitted A Different Pyzel For Stab In The Dark?

Plus, Jon Pyzel reflects on his Episode 03 cameo and predicts our 2024 SITD champ.

Feb 23, 2024

A Rare Glimpse Of Caity Simmers And Jordy Smith In The Same Freesurf Edit

Watch the #2 and #4 ranked CT surfers share an Indonesian playground with some Stab…

Feb 23, 2024

“The Grom’s In Her Place” — Molly Picklum And Jack Robinson Win 2024 Hurley Pro Sunset

A clean sweep for Australia's gen Z!

Feb 22, 2024

Checking The Mail With Our SSOTY Winners

Gallery: "And the wooden block goes to..."

Feb 21, 2024

Why Did Sawyer Lindblad Get A Paddling Interference Today At Sunset, If Jack Robbo Didn’t In 2019?

A critical analysis of WSL judging past and present. 

Feb 21, 2024

Brisa Hennessy Has The Best Sunset Rizz, Caity + BLSJ Sample New Sticks

Day three recap of the Hurley Pro.

Feb 21, 2024

Stab In The Dark With Kolohe Andino, Episode 3

Five boards face off for two Finals spots and Jon Pyzel infiltrates the set to…

Feb 21, 2024

Can We Reverse Engineer The 100-Foot Wave?  

We calculated the buoy reading for the surf to reach triple digits.

Feb 20, 2024

Stab High Site + World Surfing Reserve Playa Hermosa Is Under Threat

What’s happening in Costa Rica?

Feb 20, 2024

Brazil + San Clemente Crumble, Florence Puts The Mandoline To Work

Ewing, Slater and Medina sliced on day two of the Hurley Pro @ Sunset.

Feb 19, 2024

Soupy Sunset Skewers Three Wildcards, Jordy Smith Nicks Top Score Donning A Single Bootie

Day one recap of the Hurley Pro.

Feb 18, 2024

The D-Bah Session Heard Around The Internet

Cue the arrival of Dane Henry.

Feb 17, 2024

What The Super Bowl Taught Us About Filipe, Carissa, And Steph

And how the WSL Finals may cost us even more champions.

Feb 16, 2024

Nathan Florence, Matt Meola, Rob Machado Start All-American Light Beer Company

"It's cheap, it's light, and you can drink it all day if you want. We’re…

Feb 16, 2024