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Dynafit Radical ST Binding

Brand: Dynafit
Model: TLT Radical ST
Shipping: FREE*
Availability: Discontinued
Price: $449.00
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The Dynafit Radical ST binding is the Radical version of the classic Vertical ST. Note that Radical is capitalized, as that is a product line difference and not an unrestricted license for you to get Rad. As noted in our Dynafit Radical vs Vertical article, the difference comes down to skier preference.

  • 6mm plates under the toe and heel transfer power across a wide surface area for extra stability and control at speed.
  • Speed Step heel climbing bar offering 2 riser heights in addition to flat, which can be flicked into place with a pole after a little practice.
  • Power Towers on the toe pieces help guide your boots into the pincers, with bonus protection from side impacts.
  • A full 25mm of fore/aft heel adjustment adapts to various boot sole lengths, which can increase the resale value as more people can step in.
  • Brakes are included with 92mm, 100mm, 110mm, or 130mm options to match the width of your ski.
  • The brakes have a glide plate intended to reduce friction from rubber boot soles when releasing sideways.
  • New anti-rotational device on the brakes ensures the heel piece doesn't rotate accidentally and put you in ski mode while skinning.
  • Crampon slots are designed to hold Dynafit ski crampons for those steep and greasy skin tracks.

** Please ensure your underfoot ski width is no more than a couple millimeters greater than the brake size you select, and preferrably no more than 15mm skinnier.

Radical ST vs Radical Speed

The ST version introduces plates under the toe and heel which help transfer power across the ski and enable the use of brakes. If you plan on using the bindings at a resort where brakes are required, choose the STs. If you are only using these in the backcountry, you can consider saving $100 and 179 grams (6.3 ounces) per binding and go with the Speeds.

Radical ST vs Radical FT

The STs don't come equipped with the full length shock absorbing carbon plate found on the FT version of the Radicals. They also have a maximum release value of 10, versus 12 on the FT. If you don't huck big cliffs or weigh over 185lbs, you might not miss those features and save yourself $100 and 114 grams (4.0 ounces) per pair by getting these. You will enjoy the Speed Step climbing bars on both.

-> ounces
Weight (pair) 1092g
Boot Compatibility Tech
Brakes 92mm, 100mm, 110mm, 130mm
BSL Adjustment 25mm
Riser Heights 2 + flat
Vertical Release Adjustable 4-10
Lateral Release 4-10 or locked
Crampon Ready Yes
Specs Verified Yes
Materials 7075 aluminum, CrMo & stainless steel, high-strength plastic
Skimo Co Says
Usage Backcountry, sidecountry, resort
Notes Anti-rotational device on the brakes prevents accidental transitions
Bottom Line Good balance between weight, performance, and safety.
Question from John
Do ALL of the Dynafit Vertical models have the same 5-hole toe piece mount? I picked up a pair of skis that unfortunately had the toe piece mounted twice, and now I can't mount ANY binding except what was there before, which was a pair of Verticals but I don't know the specific model. Thanks for any info you can pass along!
Answer from Trace Leches
Hey John! Yup, all of the Vertical model bindings have the 5 hole toe piece. Send me an email at help@skimo.co if you have any further questions about binding compatibility!
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Question from Caitlin
I just ordered 4frnt Aretha, 102 underfoot. What brake size would be best?

Answer from Trace Leches
Hey Caitlin! The 100mm brake will be fine. If you have any issues you can always bend the arms out just enough for it to clear upon deployment. The brakes will often times fit a ski up to 5mm wider than the manufacturer suggests with no problems.
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Question from Bri
Hey! My armada vjj's skis are 116 underfoot. What break size is best? The 100 sounds too small and the 130 too big??? Thanks!
Answer from jbo
Hi Bri, there are some 110mm brakes available separately, but you may have to bend those out slightly. No 120s were made. The 130s will work OK.
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Question from Vadim Fedorov
Will 130mm brakes with Radical ST Binding be good choice on Chugach (107 mm waist) skis?
Should I look for 120mm brakes?
Answer from jbo
Hi Vadim, 130 will overhang a bit more than ideal. The next size down is 110mm which you may still find somewhere. We also sell them separately under our listing for Dynafit brakes.
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Question from Charlie
Can you remove the brakes entirely? I understand the Speed binding would be the model w/o brakes but I want this binding because of the plate under the front binding of which the Speed does not have. Thanks.
Answer from jbo
Hi Charlie, it's possible to hack them off but it's not recommended. The anti-twist mechanism which prevents unwanted rotation while touring is affixed to the brakes. Best bet is the Speed Rad plus B&D or Dynafit toe shims.
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Question from Blake
Hi can I switch out the breakarms on the radical ST?

Answer from jbo
Hi Blake, the arms aren't designed to be changed by themselves, though it is possible. Dynafit sells brake kits if you want to replace the whole base plate.
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Question from Rich
At 5'9" and 190 lbs, 298ish sole length, would the 10 din work for me? I usually set my dins at about a 9-11 depending on what I'm doing, so I'm a little concerned about maxing out the din. Any input..?
Answer from jbo
Hi Rich, looks like you are fluctuating between type III & III+ skier settings for your size (provided you are between 10 & 49 yrs old). Given that, it's not ideal for you to hover near the maximum binding settings. While you could probably deal with it, a binding that goes up to 12 would give you a little more breathing room. Check out the Radical FT, Plum Guide, G3 Ion, or Fritschi Vipec.
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Question from Steve
What is the difference between the Radical ST and the Speed Radical?
Answer from jbo
Hi Steve, mechanically the bindings are the virtually the same. The primary difference is the ST has brakes and the Speed Rad does not (it comes with leashes).
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Question from Nick
I am looking at buying and mounting these on the K2 Comeback 104. Would I be able to squeeze the 100mm brake on there or would I have to make the jump to 110mm? I'm concerned that the 110 may drag on turns...
Answer from jbo
Hi Nick, the brakes migrate inwards on top of the ski as they are being retracted, so you shouldn't have any issue with drag. Depending on your boot sole length, the ski may widen enough to require bending of the 100s which can compromise the stopping ability. It's probably possible to get those to work, but not necessary.
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by Chris W (used product regularly)
I use these bindings as well as the Speed Radical. Upgrading to the radical was inspired, in part, by the fact that the brakes on ST bindings seem to be pretty mediocre, even with mid-fat (90mm) skis. I've had to chase a ski more than once when it glided down despite having the brakes extended. I still use these (ST) for touring with skinnier skis, especially inbounds.
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