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Lighter and faster than ever.

Built to be light, fast, and super-simple to use, Dynafit designed its TLT Speed Radical Binding to withstand the forces of traditional alpine touring and maintain the low overall weight that ski-mountaineers demand.

  • A combination of forged aluminum, CrMo steel, stainless steel, and high-strength plastic provide plenty of strength and keep overall weight low (341g)
  • No plate under the toe means that power gets transferred to your ski more directly
  • Speed Step heel-height adjustment system activates easily using your pole tip
  • Slideable heel piece allows you to gain or lose 12.5mm of length without remounting
  • Torx (steel) screws save weight and are ultra durable
  • Guide leashes included

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Dynafit TLT Speed Radical Binding

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Here's what others have to say...

4 5

Light is right

  • Familiarity: I've used it several times

Working great so far. I do miss the brake a little bit, because I had a run away ski :-0

5 5

Need for Speed.

  • Familiarity: I've used it several times

Dynafit's TLT Speed Radical Binding is unlike any other binding I've ever skied with. This thing is surprisingly secure and performance-driven for how light it is. As my first pair of tech bindings, I'm amazed every time I clip into these beauties. My toe has yet to come off on the skin up, and I believe all the other skiers who commented negatively on this product forgot to crank the latch in front of each toe piece. I love the heel piece's innovative construction that's easy to use, adjust the heel risers, and click in. I've only lost my skis on the downhill once so far, and it was totally worth it. In an avy class, an instructor recommended not attaching the leashes in case an avalanche takes me down with the skis. What do you guys think of that?

Need for Speed.

These things can jump.

It's worth noting that the Speed Radical isn't as beefy as the ST or FT. However, you can still jump off of things on them (toes locked, for what it's worth).

4 5

Solid and light

  • Familiarity: I've put it through the wringer

Great AT binder. I am a former ski racer, I go downhill fast, and I have never had a problem with these guys pre-releasing, even on high-teton death crunch. They go uphill stupid fast and the climbing bars are very easy to use.

My only complaint is that the heel piece is not multi-directional like the old heels. Because of ice build-up I often have to turn the heel back the way it says not to, and I have no idea how bad this is for the binder. However it looks like this years model has a little block that prevents turning back that way. Otherwise, great binder.

Responded on

Dynafit tends to make small changes without really telling anybody, and this has been chronicled extensively on Wildsnow.

Depending on which heel piece you have, the "TURN" arrow may either shear a pin (pretty unlikely because the ones that had this are decently old) or mean nothing at all (the new ones).

Easy way to check: back off the screw for the heel release, remove the spring and the cap, and pop the whole heel top assembly free. If there's a small metal pin in the bottom, then try to follow the arrow. If not, then spin however you want.

2 5

Do not use with Scarpa TX Pro Boots

  • Familiarity: I've used it several times

I bought these as my first Alpine binding. I'm a tele skier that recently converted to NTN. Given that Scarpa's TX Pro is tech binding compatible I figured I would attempt to use this ridiculously light set up for back country tours. I was not impressed.

I used the spacer provided by Scarpa and even had Scarpa send me a different sized spacer but despite this I was auto ejecting all over the place.

I used them once in bounds and once on a tour. In wet snow the rear tower would ice up and be difficult to rotate back into ski mode. Also, the spacer (the hockey puck looking thing that goes in the crampon slot) really needs to be removed during all tours because mine had a tendency to fall out on its own.

Being a former cable binding guy, trying to stay super light and handle stepping in without brakes should have been a no brainer. Well I sucked at it. Maybe getting used to Dynafit bindings takes time, but it was much harder than expected.

The big kicker, and the reason I had to return them, was the fact that going over the smallest rollers would cause me to pop out of my skis. I think this is because the boot is flexing against the bellows because of the spacer underneath. If you notice, the TLT Speed Radical's toe binding is NOT mounted on top of a black spacer (that you get with the TLT Radical ST). Take a look at the photos and you'll see what I mean. The front of the TLT Radical ST is about 4 mm taller than the speed radical. My friend recently got the TLT Radical ST and uses it with his Scarpa TX Pros and has no issues. I believe this is because the included spacer works appropriately with the binding at this slightly elevated height. You might suggest skiing without the spacer if it is causing the boot to pop out of the bindings. Well then in powerful turns the sole length will shorten because of the flex of the bellows.

If you don't believe me, watch the included video I shot demonstrating two of the problems. I was so frustrated with popping out of my skis while just going down some groomers that I decided I would ski in tour mode and 'lock my toe down.' Despite this step, I was still popping out. You'll notice that the right boot won't stay in tour mode (because of ice getting under the binding, another problem that limits the use of this binding). The left boot easily locks into tour mode. Then I do a little bounce test just standing in place, not much force at all, and comes off. The right ski also popped off but you can't tell that in the video.

In the end, I'm sure this binding rocks if you have the right boots but DO NOT PURCHASE IT if you're trying to use it with tele boots with tech inserts. Go with the TLT Radical ST or another tech binding. I would have given this one star if it wasn't for the incredible light weight that still made this thing a joy to skin with. I felt like I was cheating.

Responded on

Yikes. Sounds like you had one hell of a go at it.

About the Radical ST shim: it is included because the heel tower is higher on the ST (and FT) because they have to accommodate the brakes sliding on to the heel post. If they did not shim the toe, the delta angle between the heel pins and toe pins would be pretty steep.

Your issue was probably exacerbated by the lack of any forward pressure spring on the Speed Radical, as you were relying on only the tolerance of the pins to deal with both boot and ski flex.

Both Dynafit and G3 (with the Ion) have seen to fix this somewhat in their more recent offerings, but not in the Speed Radical. I'd be curious how other bellowed boots (like an old Scarpa F1) would do.

Responded on

Any update on getting this boot to work with Speed Radicals? I'm thinking about using a B&D shim plate to raise the toe piece, which would enable me to use the 12mm puck... but I have no idea if that'd work properly.

1 5

If your a mountaineer - Do NOT buy these

  • Familiarity: I've used it several times

Got these thinking they were the business. I was to become roadrunner in the mountains. However on aproaching steepish slopes ascending hard snow (20-30 degrees) the bindings would automatically release leaving me in some bloody precarious positions. This was with the DIN set to max. This happened in excess of 10 times over a day - By the end I was ready to throw them in the bin. Im pretty chilled most of the time but these failed to impress me and are bloody dangerous if your in no slide zones and you ski hits the eject lever !!

Responded on

Ben did you happen to lock your toes per the Dynafit recommendations while touring? This will most certainly happen if you simply step in and start touring. I've yet to come out of mine while touring in "tour" aka lock mode. Another issue that can arise is if there is too much snow under the toe. You wont get a positive pin placement and can prematurely step out.

I also ski with them in this mode for no fall lines. As long as your ski doesn't over-flex you will be all set.

Responded on

As with Ryan Gibbs - I am almost certain the reason you encountered this problem was because the toe pieces were not locked in (i.e. - you pull up on the toe piece tab until it clicks all the way up) - especially if this happened to both bindings - if it were one doing it, and you were locked in, then I would say there is a malfunction but if it was both - probably the lock function.

The first time out I only clicked into them and totally spaced locking them in, and as you said, I was touring on hard snow and they popped out. I immediately locked em in and for the rest of the day I was busting hard kick turns on ice and feeling like a wizard.

Try locking em in - then come back and we'll figure out whats going on here!

Responded on

ALso make sure there is no ice in the toepiece of your boot.
I was having problems popping out on the skin track and growing increasingly frustrated until I discovered the cavities in my toepiece where the pins lock were crusted with tiny shards of ice. Cleaning it out with a multitool did the trick and I no longer had any issues. This is especially an issue with wetter snow when air temps are really cold.

5 5

What's that? Can't hear you, I'm up here

  • Familiarity: I've put it through the wringer

What's the difference between going to Shralptown USA and being tired and sad? - Not having the winged dynafit snowleopard strapped to your boots.

True, Time, and tested - these things are so simply light and efficient it makes it hard to want to really ski alpine bindings again.

The ability to have some room for boot adjustment has allowed me to move to a different shell size without the worry of remounting.

I've done a bit of personal product testing on these by hitting decent size airs, sub 10 feet, and have come out on top each time.

And going to town on some hard, chalky snow makes these things legendary.

Dyna. Fit.

Pic - nearing the top of Suicide Chute, Wasatch Range UT in the early morning light - not feeling a thing in my legs on the up, and about to have one hell of time on the way down.

What's that? Can't hear you, I'm up here
Responded on

Awesome picture Alex !!!

I selected this image to feature on the Community Hub at the bottom of the homepage! Congrats on being utterly GOATWORTHY !!

Speed Radical on the Wapta Traverse

Speed Radical on the Wapta Traverse

Amy Harris starts out the Wapta Traverse near Lake Louise, Alberta.

5 5

Simple and Reliable

  • Familiarity: I've put it through the wringer

I've been riding the Speed Radicals all year from Chamonix, to Canada, and a tone of time in the Tetons. They have yet to fail me. To me, brakes just get in the way often, plus in Pow they won't really stop much anyways. Just adapt your clicking-in routine, when sketchy I hold the ski with one hand and click in at the same time.

These binders are super light and love the uphill, but will hold their own on the down. Keep your weight over the ski and there won't be any problems.

The only mod I like is to add a lift under the toe. The ramp angle is set heel high, but I find more comfort with flat ramp angle.

Responded on

What do you use for a toe lift?I've also noticed the ramp angle bothers me a bit

Responded on

Most folks go with BnD for a toe lift. Sorry Backcountry, you should bring these guys on board!

Stupid simple. Stupid Good.

Stupid simple. Stupid Good.

Not much to say beyond I love the simplicity and durability of these bindings.

Hi, I have a pair of radicals but don't...

Hi, I have a pair of radicals but don't want to be leashed in if caught in a avalanche. Also they can be dicey to put on when on a steep slope. Can I add brakes to the radicals?

Best Answer Responded on

You cannot add brakes, and yes they can be dicey to put on when on a steep slope. A tactic I have been using is this: I lay them down on the snow and clip them into my boot. Get both skis on, then just clip the leash back to themselves once I get them on my feet. To be honest though I havent even used my leashes in a year. I do get scared but, when I am on a steep slope I am sure to chop a good step and never let my hand leave the ski and always put on the downhill ski first as it gives you more stability to stand and get your uphill on. I recently had to go to a skimo race and they made us use these like dinky cordage leashes with non-climbing mini biners, those would definitely tear away in an avalanche. Maybe the leash that comes with these are just a bit beefy use something with a breaking force of 200lbs.

Responded on

I clip my leash to the bar on my front boot buckle (Maestrale)... Confident it'll rip my buckle off before my leg off... Had a huge "snowboarder on backside edge not looking where he was going" enduced stack last weekend and came away OK...

Responded on

I have tested the leaches pretty extensively, and found that when the forces are really high, i.e. high speed crash, the leashes will break. At lower speeds though, they will keep your skis close.

Responded on

Max, how have you tested the leashes? Were they designed to break away in an avalanche. My friend and I were considering designing a breakaway linkage in the system.

5 5

Fast and Light

  • Familiarity: I've put it through the wringer

The TLT Speed Radical is a great binding for backcountry skiers looking for something lightweight and great quality. I'm 6'4 and 210lbs, and these bindings work well for me. That being said, I've popped out a couple times when I shouldn't have. I love these because of their weight, but I'd go with something different if I wanted power. The leash takes a little getting used to if you're used to a brake, but I prefer them now. Bottom line, great binding for the majority of backcountry skiers.

Responded on

Is it your toe or heel that is experiencing unintended release? I'm curious if I'll have a similar issue since I'm nearly your size.

Responded on

Thanks Mike! I'm the exact same size. Do you have the RV at 10?

Responded on

Hey Corey, it seems to be both that release at different times. At first, I didn't set the RV to 10. It definitely got better when I changed it to 10, but it still happens occasionally.

5 5

Great binding!

  • Familiarity: I've used it several times

These bindings are light weight, tough, and easy to use. These are my first AT binding, and I love them!

Is this enough binding to power a 120 mm...

Is this enough binding to power a 120 mm wide BD Carbon Megawatt? I pretty much only use these skis for BC in Powder.

Responded on

I have that exact set up. Since you'll be skiing the megawatts in powder...power from boot to ski isn't an issue. And, in reality, the binding is the least of your issues. Running a softer boot with a giant ski may provide some "lack of power" before the binding will. That said, I ski the 188cm megawatt with TLT6 boots and they shred.

5 5

I don't need no stinking brakes

It's amazing, I always say I need brakes with my fatty skis, you know in case they come off when I am pushing my boundaries and skiing hard... But every time I have only had brakes on my Fatty skis (125mm through 98mm) when I lose a ski and it's pointed downhill in powder I witness the efficiency of today's powder skis, when I see it rocketing off below... They just float up and best I can tell is I think those little brakes seeming are for show for the resorts... So the only thing that really works is leashes... Why waste the weight on a powder ski... The radical speed is all you need...

Does anyone know... what am I really gaining...

Does anyone know... what am I really gaining with the Plum Guide vs. the tried and true Dynafit Speed Radical? I'm having a really hard time justifying the additional $$ for the Plum bindings...

Responded on

Once dynafit's patent expired, several manufactures were able to join tech binding industry. Plum was one of these companies. Plum has essentially taken a really good dynafit product and has tried to make lighter, stronger, and more reliable. Wildsnow has a good comparison between the Guide and Speed binding. I don't have Plums, but I hear good things. One downside is that I have heard that customer support in the states for Plum bindings is nonexistent.

5 5


  • Familiarity: I've put it through the wringer

I have the Dynafit TLT speed radicals on my 99 wailers and my analogy to descried the combination is...making love with cowboy boots on.

5 5


  • Familiarity: I've put it through the wringer

Climb great, ski great. Was worried at first that I would miss having brakes, but I definitely don't. I'd highly recommend the B&D ski leashes with these.

Depending on your boot's fitting, it may be very difficult to lock the bindings into tour mode until the parts break in (although maybe this has been fixed in later versions). If your boot pops out, you probably aren't locked in, crank on that lever!

Unanswered Question

I have a pair of G3s that have max holes...

I have a pair of G3s that have max holes in them (filled), but I used to have dynafit bindings on it, they were borrowed, and am planning on ordering a new pair, so I would like to know if the holes will be able to go in the same spots or if there is variance between the models? (due to the fact that I can't afford anymore holes)