Dynafit TLT Radical ST 100MM Binding

Priced: $499.95 Rated:   - 4 stars out of 5 by 6 reviews.
Dynafit TLT Radical ST 100MM Binding
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Color: Black
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Dynafit TLT Radical ST 100MM Binding -
Dynafit TLT Radical ST 100MM Binding: The Radical ST is a step up from the Vertical ST because it is so easy to use and it makes the frameless system accessible to all skiing fans. With the Radical ST, there’s little place for systems with frames.
additional 6 mm plate at the front.
Speed Step climbing bar.
Side Towers for quick binding entry and greater side impact resistance.
optimized eccentric cam.
adjustable length +/- 12.5 mm.
stopper with gliding plate for excellent side release.
new torx screws.
jig/template optimized at the toe (just 4 screws instead of 5)


  • Dynafit TLT Radical ST randonee bindings include 100mm-wide integrated ski brakes that fit most all-mountain skis


  • Climbing bars flip up and down, offering 3 heights for efficiency while touring; new design eliminates the need to rotate heel pieces to adjust the climbing bar positions


  • Length of the bindings can be adjusted plus or minus 12.5mm to fit a range of boot sizes


  • Aluminum toe plates feature side towers that align your boots with the binding pins to allow easy step-in entry
  • Heel pieces are DIN adjustable (4 - 10) for forward and twisting falls
  • Gliding plates on the brakes allow good side release of the heels of the boots

Light, strong and easy to use, Dynafit TLT Radical ST randonee bindings will get you deep into the backcountry where fresh tracks are yours for the taking.


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Average Price History: Price History
Review RatingNumber of Reviews
Activity:Backcountry skiing
Boot compatibility:Tech
Brake width (mm):100 millimeters
Recommended skier weight:Unavailable
Weight per pair:1,062 grams
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Dynafit TLT Radical ST 100MM Binding Reviews:

Positive Reviews:

Not as Bad as they say

I spent most of the season agonizing on whether to get the new Radical or the old standby Vertical that is tried and tested. I finally went with the radical after a demo, because I really liked the new heel elevator system. I got mine mounted and inspected and had a pin on the heel plate (which may have been what caused the plate to break in the other review). This pin was deemed defective by Dynafit this year and they have sent replacements to all the dealers. I had mine replaced with the new pin before use. I weigh 215 lbs, and potentially put a lot of force on my bindings. I've been out 5 days touring on these binding so far and really like them. I did the Haute route last year on the Vertical STs, and I find the Radicals much more ergonomic on the uphill. They are much easier to switch amongst the risers heights than the Verticals, and they easily adjust with just the basket of your ski pole rather than pushing really hard with your pole tip and having to contort yourself and bend over to do it by hand half the time like I've found with the verticals. Some people have criticized the Radicals because the heel unit only rotates in one direction to get back into ski mode, and so you rotate the heel piece 270 degrees from the touring position rather than just back 90 degrees on the Verticals. I've not found this to be a problem, because really, you are taking the ski off anyway to take off your skins to go downhill and you're just gonna rotate the heel piece back to ski position by hand then anyway. I've never found myself in a situation where I'm using the touring mode without skins on, so I really don't see this as an issue. Also, contrary to the other reviewer, I find the new toe piece guides on the Radicals INFINITELY easier to get your boot into than the Verticals. I honestly think that if you don't find the Radicals easier to snap into on the toe than the Verticals, then you aren't doing right.

After five days of touring, I've had no issues with durability or breakage. I'm a heavy guy, and I might wear these out more quickly than my Verticals, and I don't know about long term durability yet. So far so good. I'm giving them 4 stars only because of the unknown. Mine have been great so far, butt I must admit I'm worried since I've heard of so many other people and reviews having issues. I must say, everyone I know who has had the pin replaced as instructed by Dynafit has been really happy.
SnoqualmieSkier at REI on 03/03/2012

5 stars now that the bugs are sorted out

I've skied on these bindings for two seasons, and they are my first pair of Dynafits. After a shaky start, I'm a true believer. Yes, the Radicals had growing pains, and I think I experienced nearly all of them, except the failure of the heel lifter mentioned in another review. That was traced to a manufacturing defect and has been corrected. I lost the toe lever on my first day at La Grave...thank God the guide actually found it and I was able to find a shop that could repair it. The biggest aggravation was the tendency of the heel piece to rotate into ski mode and lock down your heel when you weren't expecting it. On the 4th day of the Haute Route, I found myself resorting to duct tape to keep the heel piece in touring mode. That, too, has been corrected with a minor mod, a small piece of plastic that attaches to the ski brake to prevent counterrotation.

Now, for the good stuff....these are gloriously lightweight, relatively easy to get in and out of, and feel rock solid even when ripping groomers at the resort. My primary in-bounds skiing is at Taos, and whether hiking the ridge or walking to the parking lot, the super light weight of these bindings is wonderful. And needless to say, they tour like a dream with no added weight attached to your boot to lift with each stride.

At the risk of sounding like a fanboy, if you are serious about the backcountry, sooner or later you're going to own Dynafits...and for a good reason. Highly recommended.
Gearhound99 at REI on 07/07/2013

so far so good

I have been using these mounted on a pair of K2 Coombacks now for two seasons. After many miles of ski tours, a fun ski descent last spring, backcountry powder laps, and even a few area days, these bindings have not let me down. Solid construction, much more reliable than other plastic bindings, and super light weight. I find the heel risers super easy to adjust. Only suggestion would be to make the tall riser a bit taller for steep ascents. Otherwise, great AT binding.
skidown at REI on 02/02/2013

Love it

These bindings look like they shouldn't work at all, but after getting used to seeing almost nothing but boots and ski they worked great. Skied all year with them never releasing and I'm 230. Had a pair of dukes which are super beefy, but too heavy for the hill climbs up Mt Adams. They make your skis so light and nimble Only wish they could be a little more affordable $$$$
Walk don at REI on 10/10/2012

Negative Reviews:

Binding Failed on First Tour

On the first tour with my new bindings, I was traveling uphill with the heel piece in the maximum height position. I slipped and came down a little harder than usual; the plate the heel lifter is attached to shattered (see photo). I have since read about this happening to other people. Between the recall and now this plate shattering issue, Dynafit has done a poor job with this binding. I exchanged it for the Dynafit Vertical, which so far I really like. I also find the Vertical much easier to get in and out of and much more durable compared to the Radical.
AlpineJim at REI on 03/03/2012

like all good things, they won't last

All my Dynafit gear has failed earlier than I expected, and their customer service in the US is non-existant. Midway through my third season, both heal pieces broke. That may be too long to be covered under a material warranty, but I wouldn't know since no one at Dynafit ever got back to me (email or phone). Definitely only buy Dynafit through REI or someone else that can help back up warranty issues.
jmulderr at REI on 12/12/2013