2019-2020 4FRNT Inthayne

Ski: 2019-2020 4FRNT Inthayne, 188 cm

Available Lengths: 181, 188 cm

Blister’s Measured Tip-to-Tail Length: 185.4 cm

Stated Weight per Ski: 1995 grams

Blister’s Measured Weight per Ski: 2043 & 2046 grams

Stated Dimensions: 138-118-129 mm

Blister’s Measured Dimensions: 137.3-116.3-128.6 mm

Stated Sidecut Radius (188 cm): 25 meters

Measured Tip & Tail Splay: 79.5 mm / 74.8 mm

Measured Traditional Camber Underfoot: 0 mm

Core: Aspen + Maple Underfoot + Carbon Stringers + Fiberglass Laminate

Base: 1.3 mm sintered carbon “race base”

Factory Recommended Mount Point: -5.8 cm from center; 86.9 cm from tail

[Note: Our review is being conducted on the 18/19 Inthayne, which will return unchanged for 19/20, apart from graphics.]

Luke Koppa reviews the 4FRNT Inthayne for Blister
4FRNT Inthayne
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Review Navigation:  Specs //  First Look //  Bottom Line //  Rocker Pics


4FRNT pro rider and ski builder, Thayne Rich, came out with his signature ski, the Inthayne, two seasons ago. His goal was to combine the quick-turning nature of the 4FRNT Renegade with the playfulness and twin tail of the 4FRNT Devastator in order to make a ski that he could throw tricks and land switch on in deep snow. For a bit of context surrounding the Inthayne and Thayne himself, check out this video:

This year, 4FRNT tweaked the Inthayne, making it a bit lighter and reducing the sidecut from 35 m to 25 m. The ski is returning unchanged for 19/20, apart from graphics. We’ll be getting the new ski on snow very soon, but for now, let’s take a look at how it compares to some of the other pow skis on the market.

What 4FRNT says about the Inthayne:

“Pro skier, Thayne Rich known for his award winning backcountry freestyle video segments in Level 1 has completely re-designed his ski for this year. Imagine the snow is stacked up outside, and you’re on a mission to build a booter and land in bottomless powder. You don’t just want to hit it, you want to stomp it switch. This ski has the power to charge, yet also the ease to slash, pop, spin and ride out switch everywhere on the hill. It achieves this through it’s unique reverse camber that allows you to drive the ski underfoot vs. pressuring the tips like a traditionally cambered ski. The result is tips that automatically rise out of the pow in all conditions like no other. New this year, Thayne tightened the sidecut from 35 to now 25m radius and mellowed out the reverse camber to be flatter enabling the ski to turn quicker while maintaining the same weight. If you want to ski natural features like you’re hot lapping the terrain park, Thayne’s signature ski is your ticket to stick it.”

The highlights here seem to be the Inthayne’s playfulness, maneuverability, float, and general freestyle performance. That seems pretty standard for the pro model of a skier like Thayne, so let’s get to the ski’s actual design:

Shape / Rocker Profile

The Inthayne looks a bit like a more symmetrical 4FRNT Renegade — the Inthayne’s tips and tails taper pretty early, and the shape looks nearly symmetrical overall. The Inthaynes shape actually looks pretty similar to the J Skis Friend, with the Inthayne having slightly narrower tips and tails and less sidecut.

4FRNT’s description of the Inthayne’s rocker profile is pretty accurate — the ski is mostly flat, with no camber and a bit of early rise in the tips and tails. But the Inthayne’s rocker lines aren’t super deep. As we’ve seen on other flatter, reverse-camber skis like the Black Crows Corvus and Volkl 100Eight, this sort of flat rocker profile often results in good edge hold when you tip the ski on edge. But the Inthayne still has a high, twinned tail.

Flex Pattern

Here’s how we’d characterize the flex pattern of the Inthayne:

Tips: 6.5
Shovels: 7-7.5
In Front of Toe Piece: 8-9
Underfoot: 9.5
Behind the Heel Piece: 9-8.5
Tails: 7.5-7

The Inthayne’s tips and tails are pretty soft, but its flex ramps up quickly and much of the ski is quite stiff. As Thayne mentioned about the ski, its tails are a touch stiffer than the tips, which is designed to offer more support on forward landings while letting you bend the tips and let the tails rise on switch landings.

Compared to the J Skis Friend, the Inthayne’s tips and tails are a touch softer, but the Inthayne’s flex pattern ramps up much more quickly, while The Friend’s flex ramps up slower.

Sidecut Radius

While 4FRNT decreased the Inthayne’s sidecut this year, the new ski’s radius is still pretty long at 25 meters. Of course, sidecut numbers can often be misleading or downright made-up, but we’ll be keeping this in mind when we’re on the Inthayne to see how it handles a variety of turn shapes.


The Inthayne is very light for its size. At just over 2000 grams for the 188 cm version, it definitely falls on the lighter end of the spectrum. As you can see below, there are only a handful of skis of similar sizes that come in lighter than the Inthayne.

For reference, here are a whole bunch of our measured weights (per ski, in grams) for a number of notable skis. As always, note the length differences to keep things apples to apples.

1710 & 1744 Atomic Bent Chetler 120, 184 cm (18/19–19/20)
1910 & 1941 Scott Scrapper 115, 189 cm (17/18–18/19)
2013 & 2099 Moment Wildcat / Blister Pro, 184 cm (18/19–19/20)
2034 & 2052 Blizzard Rustler 11, 188 cm (17/18–19/20)
2043 & 2046 4FRNT Inthayne, 188 cm (18/19-19/20)
2083 & 2097 Line Magnum Opus, 188 cm (15/16–18/19)
2102 & 2137 Line Sick Day 114, 190 cm (17/18–19/20)
2126 & 2173 Rossignol Super 7 RD, 190 cm (17/18–19/20)
2130 & 2130 Moment Wildcat / Blister Pro, 190 cm (18/19–19/20)
2133 & 2133 Salomon QST 118, 192 cm (17/18–18/19)
2183 & 2190 Black Crows Anima, 188.4 cm (17/18–19/20)
2196 & 2199 Icelantic Nomad 115, 191 cm (17/18–18/19)
2220 & 2252 Faction Prodigy 4.0, 186 cm (17/18–19/20)
2212 & 2215 Armada ARV 116 JJ, 185 cm (17/18–19/20)
2222 & 2278 Prior CBC, 184 cm (17/18–19/20)
2228 & 2231 Blizzard Spur, 192 cm (17/18–19/20)
2230 & 2250 Black Diamond Boundary Pro 115, 185 cm (17/18–19/20)
2246 & 2265 Fischer Ranger 115 FR, 188 cm (17/18–18/19)
2267 & 2270 Whitedot Ragnarok 118, 190 cm (16/17–18/19)
2296 & 2309 Liberty Origin Pro, 192 cm (17/18–19/20)
2297 & 2317 K2 Catamaran, 184 cm (17/18–19/20)
2341 & 2357 Dynastar PR-OTO Factory, 189 cm (18/19–19/20)
2343 & 2360 J Skis Friend, 189 cm (18/19)
2346 & 2351 Nordica Enforcer Pro, 191 cm (17/18–19/20)
2382 & 2395 ON3P Billy Goat, 184 cm (17/18–18/19)
2408 & 2421 ON3P Kartel 116, 186 cm (17/18–18/19)
2429 & 2437 Kingswood SMB, 188 cm (16/17–18/19)
2438 & 2492 Rossignol Black Ops 118, 186 cm (16/17–19/20)
2490 & 2529 K2 Catamaran, 191 cm (17/18–19/20)

Some Questions / Things We’re Curious about

(1) As we just noted, the Inthayne is quite light. So how stable will it feel in conditions that aren’t super deep and forgiving?

(2) The Inthayne is a reverse-camber ski with pretty high tips and tails, but it’s still pretty flat through most of the ski. So just how easy will it be when it comes to making quick slashes and pivots, and what about edge hold on firm snow?

(3) With its twin tip and fairly forward recommended mount point of -5.8 cm from center, we’re curious to see how the Inthayne will respond to a more directional, forward stance, in addition to a more centered, balanced one.

Bottom Line (For Now)

The 4FRNT Inthayne’s design seems right in line with what it was designed to do: slash, slarve, and throw tricks in deep snow. We’re very curious to see what the on-snow result is, so stay tuned for updates.

Flash Review

Blister Members can now check out our Flash Review of the Inthayne for our initial impressions. Become a Blister member now to check out this and all of our Flash Reviews, plus get exclusive deals and discounts on skis, and personalized gear recommendations from us.

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Rocker Pics:

Full Profile
Tip Profile
Tail Profile
Top Sheet

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