The Dynafit Speed Radical is the standard by which touring bindings are measured. Evolved from the tried and true TLT Speed, the binding is designed to be safer, easier to use, and support a wider range of boots sizes and release values. The skiability and precision control of the previous incarnation remain intact. If you are looking for a lightweight binding that gives you more adjustability and riser options than a race binding, the Speed Radical may be for you.
Update: All Speed Radicals now come with an anti-rotation mechanism that is mounted under the heel to prevent accidentally going into ski mode while skinning. All of our stock is current with this mechanism.
Power Towers on the toe pieces are easier to step into and offer protection from pre-release during a side impact.
Speed Step climbing bars enable you to change riser heights with a flick of a finger or pole, no heel rotation necessary.
Adjustable heel piece (up to 25mm) lets you step in with various size boots or loan them out to a friend with big feet.
Release values adjust between 4 and 10 for both lateral and vertical releases, so you can customize your injury prevention.
Made with forged 7075 aluminum, high-strength plastic, chromoly and stainless steel to ensure your skis stay attached.
Comes with optional leashes so you can make your rig resort legal when accessing the side-country.
Speed Radical vs Radical ST
The ST version of the Radicals weighs 183 grams (6.5oz) more than the Speed due to the inclusion of brakes and lift plates to accommodate them. To ease the pain of the missing brakes, Dynafit included optional leashes with the Speed Radicals to keep you on good terms with ski patrol. A few people might notice a difference in power transfer without the lift plates, but it's very few.
Speed Radical vs Speed Superlite
The Speed Superlite bindings cut 161 grams (5.7oz) and a host of options off the Radicals. The Superlites have no fore/aft heel adjustment so you have to mount for one pair of boots. They are also missing a flat riser option, Power Towers, and the optional leash. If these bullet points and $150 don't matter to you, the Superlites will get you to where your going faster.
Is skier weight a consideration with these at all, other than DIN setting? Should heavier skiers move towards the ST/FT? I like the leash concept and weight savings but am concerned with durability, drive-ability, etc.
Hi RMC, there is no published skier weight limit, and the latest iteration seems to be holding up well. The ST/FT 1.0s are the same construction so not any stronger, though the ST/FT 2.0s are noticeably beefed up. You could also check out the G3 ION LT 12 which is a bit beefier yet still light sans brakes.
I paired these with the Movement Sweet Apple skis for my girlfriend. Over two seasons, she has toured on them regularly and used them at the resort maybe 10 times with no issues at all. (She weighs 105 lbs and is not an aggressive skier.) They are not the absolute lightest, but the combination of weight, function and price is hard to beat. Another reason I chose these for her, and not a race binding, is that she needs a very low release setting, and these go down to 4. She skis them on a 4 or 5, and they have released when needed, without pre-releasing. Small people take note. The adjustable heel is also handy for boot changes without remounting, as happened when her F1 Evos were recalled.
I have been on Dynafit bindings since I began skiing a couple years ago. The first set was the Radical ST, so I felt good about changing to the Speed Radical when I got some new skis because I preferred using a leash to brakes when in the backcountry, and the fact that the Radical lets you skin with your boot flat to the ski as well.
A year on, I have been reasonably happy with the Speed Radical bindings. There is nothing that stands out to me as a drawback to them other than the weight (I recently purchased the Superlight 2.0 and that binding has changed my mind about binding weight...).
It seems that the rotation pin has been a problem in the past (I have the 15-16 model), but I haven't had any issues with them. Also, I've had no problems with the 'rotation issue' so far, but have spent more time area skiing this winter because my son has been learning to ski as well.
All in all, it the Speed Radical has been a solid binding for me. I'm certainly interested in the Plum Guide and the G3 Ion, but until I get some new skis, there doesn't seem to be any reason to mess with something that works - which the SR does...
60+ days on these bindings used with La Sportiva Spitfires.
I like these bindings but have had the same "rotation issue" as most everyone else. I'm getting ready to purchase/add the Maruelli fix to them to help (and cut weight to boot). I am a larger guy with relatively flexible boots who likes to use the heel risers. I find that the 1st riser position causes the rotation most often (far too often, especially on side hill skinning) but it is very rare to have a rotation in the 2nd/top riser position ... so i often skip the 1st.
With all that being said: I've had no other mechanical issues with them, love the light weight, like not having a ski break, have used them with the Dynafit Ski Crampon (works great), have had them release when needed but never when unwanted. Personally, i like having the 3 heel positions and use all 3 regularly.
Side note: ski leashes. I use the Dynafit leash and attach it to my boot with medium strength zip-ties. The rational is it would likely break if caught in an avalanche but not a normal wreck or accidental release. No problems with this system so far.
These are fantastic bindings. I upgraded from the Radical ST and have no regrets so far going with these over the brakes. Simple, light, and fully adjustable for both release values and BSL. While so far I have been too paranoid to go without leashes (B&D), this is the norm for Skimo racing. I guess if you're inbounds and not in deep powder, you stand a chance of getting the ski back -- though the number of pieces you'll get may vary. ;)
These bindings offer simplicity. Super easy to change heal height on the fly. Easy to adjust DIN setting. Great adjustability if you use multiple pairs of boots. Easy to get in and out of the radical toe. Which makes this a great first tech binding for anyone.
Only negative is that sometimes the binding will spin while skinning on hard surface or setting skin track in deep snow. This causes the ski boot to lock into ski mode.
Bottom Line-I have these bindings on all pairs of my skis and would recommend them to anyone.
Excellent balance of weight, function, and price. If you're just looking for a light weight touring binding (not for racing), this is all you need. I doubt I will ever shell out the extra cash for a pricier binding for general purpose ski touring.
This is my first tech binding coming from Fritschis and I like how these ski much better, having your feet so close to the ski. The heel risers are a breeze to operate and they have held up fine despite me weighing 195 pounds and sometimes carrying a backpack up to 40 pounds.
I have the same rotation problem as others describe, with the heel unit sometimes rotating into ski mode while touring. It doesn't happen that often though.
I think the stock leashes are pretty sketchy as I don't want the skis flying around my body and hitting me in the face if I crash. I use the B&D coiled stretch leashes with the breakaway tab in case of avalanche etc. and they work great.