Axiom Insanity Review: A Straighter, Worn-In MVP Inertia

The Axiom Insanity is Axiom's take on a worn-in MVP Inertia - a Speed 9 control driver with slightly more high-speed turn and a noticeably softer fade than the Inertia exhibits fresh out of the box. Where a lot of understable Speed 9 drivers ask you to wait for gyro overmold plastic to break in before they fly predictably, the Insanity ships already living in that sweet spot: straight and reliable for average power throwers, with just enough turn in reserve for high-power players to flip it over into turnover and hyzer-flip lines.

This review covers the Insanity's 9/5/-2/1.5 flight in detail, who actually benefits from throwing it, how the Proton, Plasma, Neutron, and Cosmic Neutron plastics differ, and how it compares to two similar understable drivers already covered on this site, the Innova Sidewinder and the Discraft Avenger SS.

Who Should Throw the Axiom Insanity?

The Insanity's mild -2 turn and light 1.5 fade make it read differently depending on how much power you put behind it, so where it fits in your bag depends heavily on your arm speed.

• Beginners: A workable first Speed 9, but not the most beginner-friendly option on the market. At lower arm speeds the turn barely activates, so the Insanity tends to fly mostly straight with a gentle finishing fade rather than turning hard right the way a -3 or -4 disc would. That predictability is useful, but players who are still struggling to get any distance out of Speed 9+ discs may get more benefit from something like the Innova Sidewinder first.
• Intermediate players: This is where the Insanity earns its reputation. Average power throwers get a flight that stays remarkably straight for most of its distance with only a light fade at the end - exactly the description Axiom uses for the disc. It is forgiving of a slightly off-axis release and does not punish a flat, straightforward throw the way a more overstable driver would.
• Advanced players: High power throwers can push the Insanity into genuine turnover and hyzer-flip lines, using the -2 turn deliberately rather than fighting it. It also handles tailwind and utility shots well at higher speeds. Advanced players who need a fully neutral or overstable Speed 9-11 driver for headwind work should look elsewhere in their bag - the Insanity is not built for that job.

New to reading flight numbers like these? The flight numbers guide breaks down what each of the four numbers actually controls in the air.

How the Axiom Insanity Flies

The 9/5/-2/1.5 flight numbers describe an understable control driver with above-average glide and a soft finish. The Speed 9 rim is fast enough to access real turn at moderate power without demanding an advanced arm; the 5 glide keeps the disc carrying rather than dropping early; the -2 turn is enough to notice but not so much that the disc becomes unpredictable; and the 1.5 fade brings it back to earth gently instead of snapping hard left.

For a RHBH thrower releasing flat, the Insanity holds its line at release, drifts slightly right through the high-speed phase, and finishes with a soft left correction rather than a hard fade. Axiom's own description compares it to "a longer Crave" - useful shorthand if you've thrown that mold. High power throwers see the turn extend further before the fade takes over, which is what unlocks the hyzer-flip and turnover utility shots advanced players use it for.

In headwinds, the Insanity behaves like most Speed 9 understable drivers - a stiff headwind will amplify the turn and can flip it further over than intended, so it is not a reliable headwind disc. In tailwinds and on hyzer-flip lines, that same understability becomes an asset, letting the disc ride out and cover more ground than a neutral or overstable driver at the same speed.

Axiom Insanity Plastics Compared

Axiom makes the Insanity in four main plastic blends, and which one you buy changes both how the disc feels in hand and how quickly it beats in toward more understable numbers.

• Neutron Plastic: Axiom's base plastic - a durable, grippy blend that pros have picked for its consistent flight and feel. The most affordable way into an Insanity and a solid everyday choice. Around $15-17.
• Proton Plastic: Axiom's premium look-and-performance plastic - a transparent candy-colored core with an opaque Neutron overmold. Proton tends to fly slightly more overstable than base Neutron at the same weight, which nudges the Insanity's numbers a touch more predictable, and it holds up well to regular course wear. The most popular standard Insanity listing. Around $17-21.
• Plasma Plastic: A highly durable, semi-gummy premium polymer with a pearlescent metallic sheen and color-shifting tones. Excellent grip in damp conditions, at a similar price point to Proton. Around $18-22.
• Cosmic Neutron Plastic: A special-edition Neutron blend widely chosen by pros for its flight, extra grip, and durability, with a swirled cosmic finish. A good pick if you want the base Neutron flight with a bit more visual flair. Around $19-24.

Recommendation: start with Proton. It is the most widely stocked Insanity, holds its flight numbers longest before beating in, and the transparent candy colors make it easy to spot in rough or fairway grass.

Similar Discs to Consider

If the Insanity isn't quite the right fit, here are three natural alternatives already covered on this site:

• Innova Sidewinder - Also Speed 9, but with a more aggressive -3/1 finish that turns harder right and is more forgiving for beginners still struggling to get distance. The better choice if you want maximum turn for rollers and low arm speeds; the Insanity is the better choice once you want more predictability at the same speed.
• Discraft Avenger SS - A Speed 10 understable driver with a similar -3/1 profile, one notch faster than the Insanity. A good next step once you have outgrown the Insanity's Speed 9 ceiling but still want an easy-turnover flight rather than a fully neutral driver.
• Innova Thunderbird - Also Speed 9, but neutral rather than understable (9/5/0/2). Where the Insanity turns and finishes soft, the Thunderbird holds a straighter, more stable line at the same speed - a better fit for advanced players who have outgrown understable Speed 9 discs entirely.