AT Boot Comparative Flex by model (updated)

[LeeLau]

Old thread was here. Have PM'ed Tony but he's missing so don't have ability to update the list. I will commit to updating the original post. Looking back this goes to 2007 so has some super old boots but is very useful to leave it in so I've kept as much as possible original

Overall general article is here from 2013

2016 article with same general advice is here https://www.wildsnow.com/11066/at-sk...-buying-guide/

AT Boot Comparative Flex

The list has been (un-scientifically) compiled by:

a) Posters' input comparing their stiffest AT/Freeride boots' flex (Endorphins, Tornado, Aero Freeride) against their alpine boot. A single alpine boot brand's flex range (in this case, Salomon) makes for better comparability in contrast to mixing flex ranges from Lange, Tecnica or Nordica.

b) Once the stiffest AT/Freeride boots flex ratings have been established, the ratings of the softer AT boots were established down the flex range fine-tuning up or down according to, again, posters' input.

Alpine boots used for comparison

140 - Lange 140 RS
100 - Salomon X-Wave 9
95 - Salomon Gun
90 - Salomon X-Wave

THE LIST (stiffest ---> softest) as of 28 March 2024. Edit lots of holes, needs updating
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135 - Dalbello Lupo AX130C, Atomic Hawx Ultra XTD 130 Boa GW, Dynafit Hoji Freeride, Roxa R3 130 TI (?? - MUnicorn?]

130 - Atomic HawX Ultra XTD 130 (pre 2023-4), Dynafit Vulcan (w/ tongue - w/o tongue subtract 10), Tecnica Cochise Pro 130, Dynafit Khion

125 - Tecnica ZeroG Tour Pro, Lange XT3 Tour Pro

120 - Dalbello Lupo AX120, Scarpa Mobe, Tecnica Cochise Pro 120, Salomon Mtn Lab, Dynafit Hoji ProTour, Dynafit Ridge Pro

115 - K2 Pinnacle 130, Scarpa Freedom SL, Tecnica ZeroG Guide Pro. Scarpa Maestrale RS, Black Diamond Factor,

110- Dynafit Mercury (w/ tongue - w/o tongue subtract 10), Dynafit Khion MS, Atomic Backland XTD 120, Dynafit Titan,

105 - Tecnica ZeroG Peak, Titan UL, Scarpa Hurricane,

100 - Arcteryx Procline, Dynafit TLT6 Performance, Tecnica Cochise Light 120, Dynafit Zzero ("Green Machine") CF 4-buckle [2011-12 version with full carbon cuff),

95 - Fisher Carbon Traverse, Atomic Backland, Scarpa F1, Dynafit TLT7, Dynafit Winter Guide, Scarpa Typhoon/Skookum (stiff tongue), Black Diamond Quadrant, Garmont Endorphin, Garmont Axon,

90 - Dynafit One PX, BD Prime, Garmont Radium, Dynafit ZZeus, Dynafit Aero Freeride (4-buckle), La Sportiva Spectre

85 - Dynafit TLT5 Performance, Scarpa Maestrale, Scarpa Tornado/Pro (black tongue), Dynafit TLT6 Mountain, Scarpa Spirit 4 (black stiffer tongue), Garmont Adrenaline, Dynafit Zzero (older "Green Machine") CF 4-buckle [pre 2011-12 version), Black Diamond Method, Salomon Ellipse e2

80 - Dynafit TLT5 Mountain, Scarpa Denali XT/TT, Scarpa Spirit 4 (green softer tongue), Lowa Struktura Rodeo/Pro, Dynafit Zzero PX 4-buckle

75 - Scarpa Rush, Scarpa Spirit 3, Garmont Megaride/G-Ride, Lowa Struktura Evo, Dynafit Aero Speed (3-buckle), Dynafit Zzero CF 3-buckle

70 - Dynafit Dy.N.A EVO, Scarpa Matrix, Old Scarpa Denali (4-buckle red shell), Dynafit TLT 700

60 - Dynafit Dy.N.A PDG, Scarpa Laser, Garmont Dynamite, Dynafit TLT 500 (2-buckle + strap), Scarpa F3

50 - OLD Scarpa F1, Garmont Megalite, Dynafit TLT 4 Evo (3-buckle), Dynafit TLT 4 Lite (2-buckle + strap), Dynafit Zzero 2C

40 - Scarpa F1 Race (2-buckle, no strap), Dynafit TLT Race Pro (1-buckle + strap)

[LeeLau]

Thanks to Greg for making me rethink some of my ratings which might have been a bit conservative.

I would like to add date for Technica - anyone? Marshall? Verbier?

Also there was only one other person who mentioned flex ratings for Quadrant. Anyone?

Anyone comment re the Dynafit DNA?

Shocking Vulcan flex rating confirmed for production boots which are now in my hands and several other non-sponsored by Dynafit people I know. I will ask for this to be stickied

[LeeLau]

Edit - found marshalolson's Cochise Book of Genesis - http://blistergearreview.com/gear-re...hise-pro-light

where he says (talking about the Cochise Light): "2. the cochise is significantly more laterally rigid (i.e. ability to put power into the edge) than the titan.
3. the cochise is fore-aft a touch stiffer than the titan. roughly if othe cochise 120/pl is 120, the titan is 110 and the zzeus is 95.'

So maybe the Cochise Light is 110 and the Cochise 120?

[Ocean]

Thanks for doing this - It's great!

BD Method is in twice (85 and 90 Flex).

[sf]

Can at least confirm that the Pro lights feels and skis a lot stiffer than my original bd factors. Not sure if the 130 factors from the last few seasons are stiffer than the original 130s

[marshalolson]

Edit - found marshalolson's Cochise Book of Genesis - http://blistergearreview.com/gear-re...hise-pro-light

where he says (talking about the Cochise Light): "2. the cochise is significantly more laterally rigid (i.e. ability to put power into the edge) than the titan.
3. the cochise is fore-aft a touch stiffer than the titan. roughly if othe cochise 120/pl is 120, the titan is 110 and the zzeus is 95.'

So maybe the Cochise Light is 110 and the Cochise 120?

i would call the cochise pro 98 a 125-130 or so, the cochise 120 a 120, and the cochise light a 110. i cannot compare the vulcan to the pro 98 directly though... so not sure how that all plays out.

however, the only reason the light is 110 not stiffer is because it has a normal strap, not the buckle strap. i mod'd my lights to add the strap (or a WC booster would also do it), and with that, you would be right at 120. the plastic is the same between the 120 and light anyhow. the pro 98 is a touch stiffer because it has thicker plastic in the lower.

they are all for sure a notch or two stiffer than a titan or maestrale rs - for-aft certainly but most notably laterally.

hope that helps?


also, FWIW, the lange RS140 and lange RS130 shells are identical. the RS140 just has a lace-up zip fit style liner, opposed to the stock consumer liner in the RS130.

[rod9301]

I assume you are talking about the forward flex. I had garmont adrenalines a few years ago, and laterally they were very soft.when I switched to factors, they skied on firm snow just like my alpine boots.

Not sure how you measure it , but lateral flex,to me, is more important than forward flex.

Again, maybe the at boot manufacturers have figured this out and all boots are stiff enough laterally.

Sent from my SCH-I500 using TGR Forums

[sethschmautz]

Thanks Lee Lau, I've been waiting for an update to this to help with a new boot decision coming up.

I skied the Quadrant side by side with my Factors just a few weeks ago, and there is definitely a different in flex between the boots. The Factors are definitely stiffer - I felt the forward "folding" that has been described in many threads about AT boots. I have not experienced this on my Factors.

I also skied the TLT5s just this past weekend and they skied very similarly (IME) to the Quadrants, maybe a touch softer. I'm not sure if that constitutes a move up for the Factors or a move down for the Quadrants, but it was a fairly noticeable difference between the two.

My $.02. Take it for what it's worth. Thanks for the update!

Seth

[Foggy_Goggles]

interesting. this will give me a good place to start when looking to replace my one-boot-quiver Radiums. of the boots on the list, anyone care to comment on what may have a similar fit?

[GeezerSteve]

I really don't know what the fuck these numbers mean, but:

IME the TLT5M (w/tongue) skis noticeably stiffer (fore-aft and laterally) than the Spirit 4 with the hinged tongue.

(Also, FWIW, IME the TLT5 skis subjectively "stiffer" with [current model] lean-lock plate in the upright position or [1st gen] TLT5 is modded to get more upright.)

[adrenalated]

Thanks for updating this!

I would say that the Mercury is a hair stiffer than the Maestrale RS. Maybe a 5 flex rating higher - so if RS is 100, the Mercury should be 105. Also, agree that the Quadrant is softer than the Factor, and is softer than the Maestrale RS as well. Likewise, I certainly agree the various Cochise boots are stiffer than anything in the "100" category, but 20-30% stiffer? That I'm not sure of. Maybe a few of these "100 flex" boots should be in a 110 or 105 flex category? For sure the Mobe is not 20% stiffer than the Maestrale RS.

[LeeLau]

I really don't know what the fuck these numbers mean, but

Simply an attempt to assign stiffness, flex of boots RELATIVE to each other. Thoughts on accuracy of relative ranking of the One? You are one of the few with lots of experience

[funkendrenchman]

Simply an attempt to assign stiffness, flex of boots RELATIVE to each other. Thoughts on accuracy of relative ranking of the One? You are one of the few with lots of experience

I'd put the One-U very close to the TLT5 Perf.

[adrenalated]

Thoughts on accuracy of relative ranking of the One?

One is definitely stiffer than standard Maestrale and softer than Maestrale RS, so it seems about right at 90.

[*III.JVD.III*]

Can anyone comment for the Garmont Deliriums, do they live up to the claimed 130 flex?