Xtreme 37
X-Yachts · Niels Jeppesen · 2004
Updated
The Xtreme 37 is a 11.37 m planing racing yacht designed by Niels Jeppesen and built by X-Yachts, first launched in 2004. It races in Class B.
Length
11.37 m
37′ 4″
Beam
3.49 m
Draft
2.64 m
Displacement
3.9 t
Sail area
85 m²
On the podium
Where a Xtreme 37 finishes when she goes racing.
On the podium
8%
of 12 starts by 2 boats
Wins
0%
Read from 12 starts by 2 boats between 2020 and 2026, counting races with six boats or more.
Recent regattas
The latest events where a Xtreme 37 was on the start line, named as the organisers publish them.
43. Montfort Cup2026
Αγκιστρι2020
Raced one we are missing?
Report a regattaRound the buoys, or offshore
A short windward-leeward and a night at sea ask different things of a boat. Here is how this one does in each.
Round the buoys
—
Not enough data yet: no races of 10 NM or less carry a published distance.
Offshore & coastal
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Not enough data yet: 1 race over 10 NM carry a published distance.
Who she races against
The designs a Xtreme 37 actually lines up with, most often first. The bar shows how those meetings ended.
Also met, too few times for a figure:
IMX 38 (6 meetings), Sun Fast 3200 (1 meeting), J/11 (1 meeting), X-362 (1 meeting), ILC 40 (1 meeting), First 31.7 (1 meeting), Moody 39 (1 meeting), Nek 26 (1 meeting)
Some of the boats it races against
How the Xtreme 37 has fared against each of them, boat against boat on corrected time. Ordered by how often the two meet, not by who wins.
Speed at every angle
The shape of this design's speed, drawn from the measured fleet. Pick a wind and watch it stretch.
Upwind VMG
5.82
37°
Beam reach
9.82
90°
Broad reach
12.84
135°
Downwind VMG
10.40
170°
Speed in knots at 20 knots of true wind. Green marks the angles that pay: the closest useful beat and the deepest run worth sailing.
Where it wins and where it pays
Every boat is judged against its own measurements — length, weight, sail area. The quicker those say it should be, the more it has to deliver just to break even. Going fast is not enough: it has to go faster than its own numbers promised.
It needs pressure to show what it can do. Give it a fresh day and long legs and it delivers more than it promised; in a drifter it is working uphill.
Where it gains
Its best ground is on the run once it pipes up, where it goes better than its measurements say it should, and by a margin worth having. It holds that advantage off the wind as well, so the gain is not down to one leg of the course.
Where it pays
It falls short on the beat when it blows, giving away time it never gets back. That is a hull that wants to get up and go, and needs pressure to do it.
Above the line it delivers more than promised and gains on the fleet. Below, it falls short. Move the wind: plenty of boats sit on one side in the light and the other when it blows.
Full width is 1.8 kn either way.
At 10 knots this design makes back more than its rating asks on the downwind.
How fast is a Xtreme 37
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 4.22 | 5.42 | 5.71 | 5.82 |
| 52° | 6.36 | 7.64 | 7.94 | 8.13 |
| 60° | 6.72 | 7.87 | 8.21 | 8.46 |
| 75° | 7.03 | 8.11 | 8.66 | 9.09 |
| 90° | 7.01 | 8.21 | 8.99 | 9.82 |
| 110° | 7.00 | 8.54 | 9.53 | 10.73 |
| 120° | 6.74 | 8.55 | 9.82 | 11.64 |
| 135° | 6.08 | 8.15 | 9.84 | 12.84 |
| 150° | 5.10 | 7.37 | 8.75 | 12.01 |
| Run VMG | 4.42 | 6.39 | 7.57 | 10.40 |
How they are set up
The range each sail spans across the fleet.
Nearly all carry a folding propeller. A bowsprit is standard across the fleet. Crew weight is declared around 730 kg.
Rigging
Xtreme 37 rig and sail dimensions
A Xtreme 37 carries 15.18 m of mainsail hoist on a 5.17 m boom, a forestay 14.69 m above the deck and a 5.87 m bowsprit. Typical figures across the 2 boats measured under the current VPP, with the range each one spans.
Rig
Sails