Equipment Testing

JP Twin Fin 84



JP Twin Fin 84

Jp twin fin 84 2009

Board Feel

There is no rider more synonymous with twin fins at the moment than JP team rider Kauli Seadi. After signing Kauli earlier this year, JP introduces his ‘signature’ line of boards – the Twinser Wave range.

Offered in three sizes (68, 76 & 84) and two constructions, we tested the lightest (Pro Edition) 84 Twinser Wave.

manufacturer's claims

" My Twinsers give you more drive, speed and control once you are turning because there is always one of the fins in the water. With these boards you will be able to make super tight and radical turns. With a single fin board you can’t make such radical turns as the fin would be out of the water and you would slide sideways and loose control.

The Twinsers have the manoeuvrability to stay high on the wave at all times. The cut back potential will just blow you away. You can hook under the lip knowing you’re going to make it.

The combination of speed, control and manoeuvrability is just unbelievable” – Kauli Seadi

first impressions, fixtures & fittings

The JP fell short of a Gold rating mostly on account of the fins that were supplied. We found the standard fins too big to provide the loose feel that you would probably be expecting from a twin fin wave board (more on this later).

Aside from this, everything else on the JP is top notch and you can see that a lot of effort has gone into the aesthetics of the board resulting in a great looking package.


The Twinser Wave is the longest board in test at 232cm (same length as the RRD), 8cm longer than the shortest board (Mistral). It is also the second narrowest at 57cm (the Quatro is 56.9).

With quoted volume of 84 litres, it is one of the biggest boards in the test (and did feel one of the floatiest to sail).

get up and go!

The JP is very fast off the mark and the second quickest board in test overall (only marginally slower than the Fanatic). It's extremely easy to get going on and those who are familiar with single fins will notice no significant disadvantage in early planing and speed on the JP.


The JP is a great board for jumping thanks to its ‘get up and go’ qualities. It’s fast to accelerate and has a rapid top speed, meaning that you are hitting the wave with good speed. The large powerful fins give it plenty of push/kick off the top of the wave making it our favourite board for jumping (together with the Fanatic).

cross-on riding

It’s important to make something clear at this point. We test the boards on the whole with their standard fins. The ranking on our overview page and the score above is based upon performance with the standard fins.

Whilst offering a very predictable and safe ride, we consistently found the JP to be a bit too stiff for our liking. This was particularly noticeable in cross-on conditions and smaller waves where you want to be able to link a series of tight radius turns together. 

Our 80kg Clones were struggling to exert enough force to turn the board. And it is force that it needs – if you are really aggressive off your back foot, you can get the board to turn nicely, but it isn’t something that could be maintained turn after turn.

Off the top, again the board was safe and predictable, but noticeably stiffer and more difficult to do a full radius turn on. It isn’t bad, its just offers nothing that you wouldn’t get from a single fin.

Moving the fins forward certainly helped the looseness of the board, but didn’t revolutionise it. We were about to dismiss it as a board for heavier, more aggressive riders or someone focusing more on speed and ease of sailing than real surfing style, and then we changed the fins to our MFC 160 quiver fins (nearly 2cm shorter than the standard JP's)

What a difference this makes! The ride is transformed from stiff to soft and it makes the Twinser so much more fun to sail in cross-on conditions. The smaller fins let the tail slide out a bit more in the top turn, they help the board to carve through tighter turns and the only trade off is…..well, very little at all actually. The board still has plenty of grip when you need it, and still has good ‘get up and go’, but now feels much more like a twin fin ought to with more flow and manoeuvrability.

cross-shore riding

Again the fins play a big part in the boards performance. With the standard fins, the board feels too stiff for small playful waves, but a bit more at home in larger waves, where the grip and directional feel become more useful. Again, its not that the board is bad with the standard fins, it’s just a heck of a lot better with smaller ones.

Changing the standard (178) fins for 160’s or 165’s makes the board a lot more manoeuvrable and you find that the board starts to go where you want it to on the wave with ease.

wave-ride control

The JP is both predictable and grippy with the standard fins and rarely does anything unexpected or nasty. Its control rating is let down only slightly by the fact that with standard fins, you aren’t able to position the board in your wave ride in the same way that you can with some of the others, due to it being so directional. Once again, smaller fins made the board much looser and would have boosted the score further.

overall feel, ride & foot comfort

Directional, fast and firm are the best words to describe the overall feel of the JP. In a straight line it is a rocket ship and with its stiff construction, firm pads and relatively stiff straps, the overall feel is firm and responsive.

Some people will love the firm grippy pads, others may want for a bit more cushioning. The same is true of the straps, which give a nice crisp, responsive feel, but are not the most comfortable in the group.

set up recommendations

Unless you are buying the Twinser primarily for straight line performance or you are a heavyweight rider (over 90kg), you would be well advised to change the standard fins for something smaller. 165’s would suit the board nicely overall or 160’s if you want a really soft, slidey performance on the wave. If you stick with the standard fins, position them near the front for maximum looseness.

Middle position on the mast track works well in most conditions and sail sizes. Slightly further forward (1cm) for bigger waves and sails and slightly further back for a little more turning performance on smaller waves worked well.

The JP felt like the biggest board in the test in terms of volume. It was happy using up to 5.6 with our 80kg Clones (and could go a bit bigger if necessary). It was also ok with 4.7m, but was starting to feel a bit on the big side, so we wouldn’t recommend much smaller than this.

target buyer

If you like the idea of a twin fin, but aren’t sure if you will be good enough to sail it, then the JP Twinser Wave is the board for you. It’s very easy going. With a smaller set of fins, an advanced rider will also enjoy the great straight line performance combined with riding smoothness that the JP offers, which will be ideal for UK style conditions and sails of 4.7-5.6m.