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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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Here's what others have to say...

5 5

2nd pair

  • Familiarity: I've put it through the wringer

Just bought my 2nd pair and have them mounted on 114 width J Ski Friends. No issue what so ever.

Anybody have any luck getting any kind of service from dynafit after the warranty has run out. My bindings are 3 years old and one of the heel units came apart out in the back country. Obviously a manufacturing defect as I put very little stress on this binding as I am only 150 lbs. Back country was no help at all and the dynafit company was even worse.

Responded on

Hey Mike,
Dynafit handles all of their warranty issues directly. However, feel free to email me, so you have a point of contact here at Backcountry, and I will assist you as much as possible.

Emily Jenson

5 5

Feels safer than the verticals

I am definitely sold on dynafits! But after 5 years on the verticals I am so grateful I finally coughed up the cash for the radicals. I can now easily and very QUICKLY flick between riser levels, instead of fumbling around and awkwardly bending down like I had to do with the verticals. The one drawback I found was (luckily) on the first day I got them mounted and was trying them out in-bounds. Somebody next to me on the chairlift knocked me down when we were unloading, and one of them popped off. Come to find out I could make both of them pop off easily by lifting my leg to the side and kicking down on the inside edge of the ski against the ground... with the din set to 8! I readjusted all the dins to 10 (learning in the process that each binding has 2 separate din settings), and the problem reduced. But now I'm a bit nervous that they won't come off when I would want them too. Overall, love these bindings, they were worth every penny!

4 5

Ease and lightweight

  • Familiarity: I've put it through the wringer

Great touring binding. I've used these for the past year and they have held up well. I've hit cliffs, jumps, and skied hard on these and have been pleasantly surprised with the durability and feel of these. While hitting jumps the heel piece has popped off a couple of times and I can't quite tell if they popped off because of landing too far forward or if they popped off and caused me to fall forward. The toe piece has never come off during a fall, however.

This is the first true lightweight touring binding that I have owned and can now say that I doubt I will go back to a heavier set up. Easy to use, quick on the changeover, and a great binding over all. Love hiking with a lighter set up!

4 5

Standard Dynafit

  • Familiarity: I've put it through the wringer

Lightweight and easy to use. We've used Dynafits for years and still like them. The new flip heel lifts are easier to use the the old twist style but miss the ski pole turn to ski mode.

5 5

radical bindings

if you find yourself carrying a heavy pack and hauling a sled full of boxed wine several miles to a yurt, you probably don't want a heavy touring setup... These are awesome - VERY lightweight, sturdy, and simple to use (coming from someone who had previously only been on downhill bindings). The two heel risers can be flipped up and back with your ski pole, and you can switch from walk to ski mode without taking off your skis (although this requires a certain level of coordination...) I'm using these with Dynafit boots, and I haven't had any issues with the pins connecting to the toe piece so far. From a downhill perspective, I've felt confident skiing these for everything I'd ski with my resort bindings. Awesome bindings!

radical bindings
Go Everywhere

Go Everywhere

I have never had a problem with Dynafit bindings, and have actually been pleasantly surprised by their toughness. That is not to say they are indestructible. I have seen Dynafits fall apart and the resulting walk out can be ugly.

But hey, what's lighter than a Dynafit?
Half a Dynafit!

5 5

It's Dynafit, the gold standard

  • Familiarity: I've used it several times

These are awesome, plain and simple. These things tour great and give you all the confidence on the downhill. The gold standard in tech binders. Buy with confidence. Mounted on 180 Praxis Backcountry.

It's Dynafit, the gold standard
Unanswered Question

Would it be better to just get skis that aren't so wide? I can't seem to find any bindings that are 113 mm because isn't it ideal to have onesthat are the exact width of your skiis? Is bending the break the only way around this for skis that wide? I'm just getting into backcountry skiing and I'm trying to figure out the best setup.

Will the bindings fit on salmon q-115 skis 178 cm 113 ski waist?

Responded on

Hi Drake,
Yes those would work- I would recommend the 110mm brake, and they can be bent to accommodate the 113 waist.

Would these bindings fit the Scarpa freedom sl alpine touring boot?

Responded on


The Freedom SL Boots will be a great match for the Radical ST bindings.


Responded on

Thank you! One more question..sorry. Would the bindings for one Salamon Q-115 skis 178 cm

5 5

Backcountry Beauties

  • Familiarity: I've put it through the wringer

The tech binding revolution all started with Dynafit innovation and this binder keeps you secured to your skis like none other. The self guiding toe pins help reduce the "Dynafit Dance" while clicking in, and the construction is rock solid. The newer design of the uni-directional rotating heel and improved heel-height adjustments are simple to use. Using the grip of your pole you can easily flip up the heel-height for steeper terrain. The release lever on the toe can be completely locked out for no-fall scenarios. The toe pins are pretty good about cleaning themselves of ice, but be sure to double check the toe connection in heavy snow conditions. I have mixed opinions on the brakes, but they work well. For skiers who like to leave the resort gates and do some yo-yo backcountry laps, having a brake is appreciated. For super long tours, reducing the weight and going with the brakeless Speed Radical would be a good option. Just make sure you use that leash. In all, I have had great experiences with this lightweight AT binding and would recommend it for any skier looking to lighten up their backcountry set up.

Backcountry Beauties

My skis have a 95 mm waist. Should I purchase a 92 or 100 mm brake?

Responded on


You have a choice to make here. You would be perfectly fine getting a 92mm and bending the brakes to fit over the edge of the skis. The 100mm would also be a good fit. 5mm extra is not a lot of space for drag to occur and be dangerous. If you might put these bindings on fatter skis around 100mm on a later year then i would get the 100mm. If not, they you can bend the 95mm size. :D

Planning to put these on the Huascaran 186 which is 114 mm under foot. Should I go for the 110 mm stopper and bend some 2 mm on each side, or better the 130 mm stopper leaving me approx 8 mm on each side sticking out...?
Thnks! / Andy

Best Answer Responded on

Go with the 110, a skilled technician should be able to take care of that no problem.
You would be better off doing a little bending versus having so much overlap. Sidestepping with overlapped brakes can be annoying.

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.

Responded on

Just for a matter of perspective, I feel the exact opposite. I toured with the verticals for about 5 years, and could never figure out to switch in between certain heights without awkwardly bending down to twist it. This was really dangerous in certain spots and in certain conditions!!! I recently got the radical ST's and have taken them out on 4 overnight tours in steep terrain. Being able to flick to a higher/lower rise while in dangerous terrain (which I do frequently while touring) is amazing! Also, I very rarely switch from tour to ski mode in dangerous terrain, I usually am on a ridge, or can simply find a slightly better spot, so switching to ski mode without bending over has never been an issue.

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?

Best Answer 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?

Best Answer 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.

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.