Firewire Mashup Surfboard Review
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The Firewire Mashup is built for surfers who want one board that handles everyday conditions and still performs when the surf gets serious. It blends Rob Machado's Seaside with Dan Mann's Spitfire — extra paddle volume, step-down rails for control, and five fin boxes that let you run twin, quad, thruster, 2+1, or quad+nubster. To find out how that translates in the water, four real customers tested the Mashup across body weights from 143 lbs to 230 lbs, fin setups from 2+1 to thruster, and breaks from Sandys to Tahiti. Their honest takes are below.
Quick answer: The Firewire Mashup works for a wide range of surfers because the design and the five-fin-box setup both adapt. Smaller surfers (143–160 lbs) report it paddles easily and generates speed in small surf with 2+1 or thruster setups. Heavier surfers (215–230 lbs) report strong float and confident performance as wave size grows, especially with thruster configurations. Across all four reviews, the standout themes are paddle power, speed generation, and versatility across conditions.
What the Firewire Mashup Is Designed to Do
The Mashup is a hybrid groveler that aims to do two jobs at once — paddle into weak waves and still hold a line when the surf has size.
Rob Machado's Seaside and Dan Mann's Spitfire are two of the most popular designs in the Firewire lineup. The Mashup combines them. The board carries extra foam for paddle power, but the rails are tapered and step down — so a surfer gets float without the loss of control that usually comes with a high-volume groveler.
The bottom contour is part of why the board behaves the way it does. Vee runs through the tail. The middle of the board carries a single concave that's broken into a double barrel with a second inset vee along the stringer. The result is a board that rolls rail to rail easily but still finds drive and snap. A touch of concave near the tail adds flip and control.
The Mashup is built in Helium construction — a stringerless EPS core with paulownia and balsa wood rails — which is why it feels light and lively underfoot. Some models also feature Volcanic Basalt lamination for added durability. The board comes standard with five fin boxes, so a surfer can run it as a twin, quad, thruster, 2+1, or quad+nubster. It's available from 5'2" to 6'6" and is meant to be ridden a few inches shorter than your usual surfboard.
Ready to ride the Firewire Mashup?
Visit Hawaiian South Shore at 320 Ward Avenue, Honolulu — or shop the Firewire Mashup collection online. Questions on sizing, fin setup, or volume? Call or text us at (808) 597-9055.
The board has a narrow nose. That was the first thing the reviewer noticed. Narrow-looking, and you'd expect it to lose something in the paddle. It doesn't. The buoyancy surprised him — better than expected, easier to move around than it looks.
The Firewire Mashup is a board that tends to exceed initial impressions. Two different reviewers rode it, at very different sizes, in different conditions. Here's what each of them found.
Review 1 — 5'10", 230 lbs, 2+1 Setup
At 5'10" and 230 pounds, this reviewer put the Mashup through its paces with a 2+1 fin setup — Mick Fanning fins as the primary setup, then an additional set of faster fins to test the difference. The board handled both well, with speed and drive improving as the waves got bigger. The design works across conditions and keeps getting better as the wave size goes up.
His experience was straightforward: the board was more capable than expected, delivered good speed, and held up through dynamic turns. He was actively refining top-to-bottom surfing and spray off the lip — the board gave him enough response to work with.
Review 2 — 5'7", 143 lbs, Riding the 5'4"
At 5'7" and 143 pounds on a 5'4" board, this reviewer was getting into waves 100 yards from the peak. Fast and easy to paddle onto, quick to pop up. The 2+1 setup gave the board speed and drive down the line that he could feel from the moment he got to his feet.
His read: quick, responsive, generates speed easily. The Mashup rewarded an active surfing style — if you want to attack the wave, the board is set up to do that.
Review 3: Stephan Edwards — 6'0", 215–220 lbs — Two Mashups in His Travel Quiver
Boards: Two Mashups — 5'10" (36L) and 6'0" (38L)
Fin setup: AM2 thrusters, upgrading to Endorfins
Tested at: Sandys, Big Rights, Tahiti — committed to Indo travel
Stephan Edwards calls the Mashup "my favorite board," and the proof is that he travels internationally with two of them.
Stephan rides two sizes for two different jobs. The 5'10" at 36L he rides "for a little bit more fun." The 6'0" at 38L gives him "a little more volume for paddling." That dual-board approach lets him optimize for the conditions of any given session — performance on the smaller board, paddle confidence and access on the bigger one.
For a 220-lb surfer, the question is always whether the volume distribution actually works under his weight. Stephan's read: "flotation was good" on both sizes. That confirms the Mashup's volume distribution carries surfers in his weight class — not just on paper, but in real waves.
His Hawaii testing covered Sandys and Big Rights, both demanding South Shore breaks. He took the Mashup to Tahiti and committed to bringing it on his Indo trip. The fact that Stephan travels with two Mashups plus an FRK Swallow as a backup speaks to how the board has earned its spot in his quiver — international travel demands construction that holds up across transport, varied water temps, and extended use.
On fins, Stephan rides AM2 thrusters and is upgrading to Endorfins.
Review 4: Mark Hirokawa — 5'7", 160 lbs — 4 to 5 Months on the Board
Volume: 28.7L
Fin setup: Color Haze three-fin (considering a four-fin setup)
Time on board: 4–5 months
Preferred conditions: Waves under 3 feet
Mark Hirokawa has spent four to five months on his Mashup and recommends it without reservation.
Mark is an experienced surfer, and his take carries weight because he's had real time on the board — not a one-session impression. He describes the Mashup as super fun, easy to paddle, easy to turn, and easy to ride overall. Those four words capture what the Mashup is supposed to deliver, and Mark confirms it does.
His specific praise: the Mashup outperforms most epoxy boards he's seen on the market, with superior craftsmanship and durability. It moves through soft sections of waves with ease, which matters on the South Shore where many days have weak spots between sets.
Mark personally rides the Mashup in waves under 3 feet, which is where it shines for his weight class and the everyday surf he's targeting. But he's quick to mention that his friends have ridden the same board in bigger waves, and it's held up — so the Mashup isn't locked into one wave range.
He's currently on a Color Haze three-fin setup and is interested in trying a four-fin to see how the board responds. That kind of experimentation is exactly what the Mashup's five-fin-box design is built for.
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