The name might be straight from the '80s, but the tech is definitely 21st century.

Designed with a 100mm brake and gliding heel plate for improved releasability, the Dynafit TLT Radical ST Binding excels at backcountry touring and ski-mountaineering adventures.
  • A combination of forged aluminum, CrMo steel, stainless steel, and high-strength plastic provides plenty of strength while keeping overall weight low (531g)
  • The six-millimeter plate under the toe aids turnability without sacrificing power transfer
  • Self-guiding wings allow for quick entry
  • Speed Step heel-height adjustment system activates easily using your pole tip
  • Slide-able heel allows you to gain or lose 12.5mm of length without remounting
  • Stopper with gliding plate provides better side release in the event of a spill
  • Torx (steel) screws save weight and are ultra durable

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Dynafit TLT Radical ST Binding

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Peter Wadsworth

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Here's what others have to say...

3 5

Prefer the older Vertical ST

  • Familiarity: I've put it through the wringer

I have both the older Vertical ST and these current Radical ST bindings. While these are good, I prefer the older model.

There were many good improvements made to the toe piece in the Radical, but they don't make up for bad "improvements" in the heel risers. The new Radical heel assembly seems better at first, super easy to flick the risers up/down with your ski pole instead of having to rotate the whole heel assembly to adjust the angle. But, it can be really sketchy and scary to try to switch from Skin to Ski mode in a steep exposed place. With the new Radical heel piece you have to bend down and use a lot of hand torque to flip the heel into Ski Mode, or take your skis off. Not cool to do when your in a sketchy spot and wearing a pack. This is where the Vertical heel shines, you just stick your ski pole in and flick, much easier to keep one's balance.

Many people complain that the Vertical heel unit was difficult to rotate to change heel riser settings. I found it took me 2-3 days, and then I had it dialed and it took just a quick pole flick, and I could even do it in the dark during dawn patrols.

Also, The Radical binding has a noticeably increased ramp angle. The Verticals don't put you on your toes as much. Not a huge deal, but noticeable in globbed up or re-frozen snow for me.

I keep my Radicals on the skis I use more for resort dawn patrols and mellower backcountry, because the switch from skin to ski mode is easy. The skis I take to more 'mountaineery' places have the Verticals on them.

what is the difference between these and the TLT speed radicals? is it just a choice between brakes and leashes or is there more going on here in terms of release mechanism?

Responded on

So the big difference is of course brakes and leashes. In terms of release mechanism there is not much difference. The other big difference is the ramp angle.The TLT Radical ST has a plastic plate which gives it a smaller ramp angle by 2.10mm. The TLT has a more neutral stance.

I picked up a pair of skis with demo bindings on them, and I'm wondering your opinions on remounting them with the Dynafit TLT Radical ST? I've mounted other skis twice before, but usually alpine to alpine or alpine to tele. Do you think the ski has been compromised too much by the drilling for the demo/rental plate?

Responded on


You'll be fine putting these on the ski. Your ski hasn't been damaged or compromised too much. Just keep a minimum 1cm distance between the holes.

5 5

What can you say......

It's Dynafit. The standard bearer of tech bindings. Been riding the Vertical FT's for a few years and they are still going strong. Slapping these puppies on a pair of Praxis Backcountry skis in a 180 length. Looking forward to the winter.

I have some Fisher Koa 110 skis and am...

I have some Fisher Koa 110 skis and am hoping to get these bindings for them. Would the 100mm brakes be too small to stretch? It seems like the 130mm would be too large to bend inwards...

Responded on

Hey Sophia,

I kinda agree with you. Bending the brake out 10 mm is a little too much but the 130 mm brake would be too wide for that ski.

What is the proper brake size for K2...

What is the proper brake size for K2 Obsethed? Is 130 mm too wide?

Responded on

Hey Andreie,

Its kinda industry standard that a brake width 15 mm wider than the ski is acceptable. You should be good to go with the 130 width.

La Sportiva GT brake size? Just ordered...

La Sportiva GT brake size? Just ordered online here. Only 130mm available. Are they to big or can I work with it?

Best Answer Responded on

Hey mtn dude,

Thanks for your question.

Yes, the 130mm brake is definitely too big for your La Sportiva GT skis that are 89mm at the waist (there will be a lot of drag). You will want to go with the 92mm brakes that Dynafit offers for the TLT bindings. I would try to get in touch with Dynafit directly for the new brakes. Or you can return the ones you got and exchange to the proper 92mm size.

If I have G3 Cake 110, what size Dynafit...

If I have G3 Cake 110, what size Dynafit TLT Radical ST Binding? 110?

Responded on

Hey mkayes1801610,

Thanks for your question.

For your G3 Cake skis with a 110mm underfoot I would recommend the 110 brake width. I hope this helps.

4 5

Huge improvement over frame bindings

  • Familiarity: I've put it through the wringer

This season I put on my big boy pants and upgraded from Fritschis to Dynafit Radicals, and it was a world of difference. Just as everyone says, all of the sudden you're not lifting your entire binding with every step.
What I like:
*not a frame binding - tech toe is way more efficient
*easy to step in
*easy to use heel risers
What I don't like:
*release is kinda hit or miss... early on I had some early release, but raising the release setting fixed that. But I still feel like the lateral toe release isn't as good as it could be
*brakes are functionally worthless. Twice I've released from the ski only to watch it continue on down the slope with the brakes scratching little grooves in the powder, or skittering on hardpack

For my new pair of skis, I bought a pair of Speed Radicals instead with an aftermarket leash fuse (for release in avalanche), so I save weight, and don't have to count on the worthless brakes.

Getting a pair of BD converts, 105mm...

Getting a pair of BD converts, 105mm underfoot. Should I go with 100mm or 110mm brakes?

Responded on

I would suggest the 110 mm brake. 5 mm isn't to much to where you would experience a lot of drag but it is a lot to bend out.

5 5


  • Gender: Female
  • Familiarity: I've put it through the wringer

It didn?t dawn on me to every try a tech binding setup. I had used the Marker Barron and Tyrolia Adrenaline and figured those were all you needed for a good day in the Backcountry. My buddy then broke it down for me. ?Alyssa, think about how much extra weight you have to move uphill with a heavier binding. Multiply the binding weight times the amount of steps you will take, see how your energy will be on longer tours? Hmm?that got me thinking and If I wanted to take my AT game up a notch, would have to consider a more technical and lightweight binding.
This brings me to where I am today writing this review. I have zero regrets on purchasing TLT Radical bindings. They have done nothing but amazing things for my way up and down the mountain. They are substantially ligher than my prior setup, 6lbs to be exact. The heel lift feature is easy to adjust with just the flick of a pole. Struggle free transition from tour to downhill mode (very easy to swap with skis attached) These things are durable and stay on your feet even with some aggressive skiing. Ripped around snowbird on these and have taken some mellow falls and they have held strong. Highly recommended bindings if you are looking for a techy AT setup!

These were everything I needed for my Yurt trip in the Pioneer mountains in late march. A 5 mile tour into off the grid powder heaven!

Unanswered Question

Any comparisons yet on the Radical versus...

Any comparisons yet on the Radical versus the Fritchi Vipec? I am looking to move to a tech binding from a Fritchi plate binding (will be using Maestrale boots, and either BD Converts or K2 Coombacks). I like the idea of greater release elasticity but am concerned about adopting new technology with no track record yet. Also, what is the weight penalty with the Vipec? I am looking for these primarily for BC, but will probably use them inbounds on powder days, too, so how does this affect the decision?

5 5

Rock Solid

  • Familiarity: I've put it through the wringer

I was apprehensive at first with these bindings, just from the fact that they employ a different method of holding in a boot. After a season on them all my apprehension it gone. I have these paired with BD Megawatts and I love them. I use them both in the backcountry as well as the resort.
Even with a din of 12 I find that I only pop out when I need to.
Video of a trip down Scotties below:

What size brakes for the G3 District112...

What size brakes for the G3 District112 in a 179?

Best Answer Responded on

110mm brake would be your best bet.
You might have to bend them a little bit, but it would be only one millimeter on each side, so that will be very easily done.

Skiing the Sliver Couloir w the Radical

Grand Teton National Park, WY

TLT Radical STs on Superior

Some clips from one run down Mt. Superior on TLT Radical St bindings paired with the Dynafit ONE U-TF boot.

i have scott lola 175cm (131, 98, 127) and...

i have scott lola 175cm (131, 98, 127) and Dynafit Gea boots. need the set up for touring. the ski recomends flat deck bindings only. not sure what itmeans. would Dynafit Radical STs work for my skis? If so, what size break? 100 or 110? Or do you recommend another bidning altogether? Thanks much. Ceren

Responded on

Go with the 100mm brake -- better to bend them a little wider if necessary than have them as outriggers.

I have Kastle tx 97's. They are 97mm under...

I have Kastle tx 97's. They are 97mm under foot. Better to get the 100mm or 110mm brake?
What is the diff between the FT and the ST other than din setting?

Responded on

Go with the 100mm brake -- better to bend them a little wider if necessary than have them as outriggers.

The other big difference between the FT and the ST is the FT's "plate", about which Dynafit says: "The carbon plate stiffens by shifting the shock absorber forward into LOCK. In this position the rear rubber pieces work as dam- peners, and the ski stiffens up. Also, this increases torsional rigidity between the carbon plate and binding front piece. The ski will have its natural flex characteristics in the UNLOCK position."

I have the FT, but can't really feel the difference between the two settings.

5 5

Great Lightweight Option

  • Familiarity: I've put it through the wringer

threw these on a pair of Volkl Nanuq's for long distance ski mountaineering adventures... works great, no issues... I like the Radical heel lift better that the vertical's

I realize these are stellar for touring/...

I realize these are stellar for touring/backcountry. What about inbounds??

Responded on

The Dynafit TLT Radical ST Binding will work very will for inbound riding. If you want a binding that can work all over the mountain than this or the FT would be an excellent choice. However, if you spend the majority of your time in bounds there are better alpine choices such as the Marker Jester or Rossi FKS.