Dynafit Heel Pieces

Hi Mark, it sounds likely that you have a Radical ST binding. If it is all black and gray, you have a Radical ST, if there is some green and bronze color to it, you have a Radical ST 2.0. We currently have both in stock, and you can select the one you need from the drop down menu above.

I'm sorry to hear that you've broken several of these. It seems that if there is going to be a failure of the Radical ST binding, that the heel piece is the weakest link. That being said, we have many customers who have never had a problem so it seems to be hit or miss as to whether or not its an issue.

Hey Toby! Ha, it's tough to go back to heavy gear once you get a taste of the good stuff isn't it?

Officially the Radical 2.0 toe is only compatible with the Radical 2.0 heel because of the forward pressure/rotating plate. The Rad 2.0 toe has seriously soft toe springs (intentionally) to help with the lateral release factors, so it could potentially give you some really low release values. Short answer: I wouldn't do it. If you're looking at lightening up then I'd say just sell the old binding and start from square one with a complete Superlite 2.0.

Hi Joe, yes they are pretty much interchangeable. Same pin heights and mounting patterns.

Hi John, the sealant recommendations typically come from the manufacturer of the skis, not the bindings. It depends on the construction of the ski what works best.

Ah ok
Well while I have you - do you happen to know what kind of epoxy is recommended for Atomic Backland Descenders?

A waterproof wood glue is fine with those. You can step up to epoxy if the holes are janky.

Any kind of epoxy? Is there a brand that's better than others?

Orange double bubble works great!

Hey John! Dang, that's a bummer! I'm gonna say yes, it's probably possible, but unless you already have a speed turn heel that you were going to throw away it's probably not worth it. I'd just grab a completely new Speed Rad heel piece.

Hi John, you probably also want to pull out the pins that cause that cracking and install the anti-twist kit.

thanks guys - i actually just ordered a set of new radical heels from you instead of trying to tinker with this.

Hey Ryan, thanks for reaching out!

1) This isn't definitely a case of "yer gonna die" but it's also not definitely not a case of "yer gonna die." Maybe more of a case of "we don't recommend it, but try at yer own risk if yer motivated." Either way, probably not wise to mix any part of the Rad 2.0 and any part of a more traditional binding like the Speed Rad as the springs in both the toe and heel on each binding is tuned differently and who knows how they will end up behaving in release tests. Could be so low that the binding is barely usable or it could be so high that the binding release forces exceed that of the strength of your bone structure. Either scenario isn't anywhere near ideal though and I don't recommend it.

2) I checked the hole pattern for both bindings and it looks like that's probably not gonna work. We recommend at least 15mm between each QK insert and there's just not enough space in the Radical 2.0 hole pattern for a Speed Radical to fit with inserts. You could potentially get away with it if you didn't have inserts in the ski, but there's still not a whole lot of potential there.

FWIW, I'm doing the inverse of that with very good results - Using Speed Radical toes with Radical ST 2.0 heels. Releases are appropriate (it does release, but no pre-releases). Skied many times with this setup on Voile Vectors last year, both BC and on Resort. I used the B&D 6.4mm shims under the toes.

That's awesome to hear actually, I'm glad to hear that it's going well. We have definitely built a few of these setups before and have had no negative reactions (so far) so it sounds like it's entirely doable. Sounds like my apprehension was a bit excessive to begin with. Still not recommended by Dynafit and we haven't been able to put these setups on our release testing machine so I can't comment on exactly how it performs under stress, but it sounds like it's working close enough to appropriately that it's feasible, which is sweet.

Hi Andres, unfortunately the Radical and Vertical spindles are not compatible.

Hi Alexis, yes all Radical ST generations are compatible.

Hey Brian, yeah that is an issue with the older Radical heel pieces unfortunately. There are 3 iterations of that heel piece now, the original, an updated heel piece (reinforced so it's a bit stronger), and then the latest iteration that has addressed this issue even further. How old are your bindings?

Hi Bjornar, you could try something like a Plum Race 150 heel on a Kreuzspitze 14mm plate (same hole pattern as Speed Radical).

Hey Markus. Yup, the dual springs and end cap are in there, but no base plate.

Hi CVT speed turn will fit into the same holes as your comfort heels.

Hi James, the key is to turn it 180 degrees so it's facing backward. Then it will lift off.

Hi - thanks for the reply, but I can't see how to turn it 180 degrees; the metal clip which locks the brakes in the up position while touring stops the heel piece rotating around this far (it physically doesn't fit). I've tried all other possible rotations and no joy.

Hi James, it'll go 180, don't be shy. Hold down the brake and go for it.

Yep I figured it out, thanks. The trick was to partially depress the brake, and then it all fits perfectly - there's a sweet spot. The mind boggles at the design that goes in to designing these things; true 3D chess!

Hey Marcus, the heel pieces have stronger screws and reinforced housings but haven't gotten the metal plate update yet! Should be sometime this summer that we see that update.

Hey Neil, unfortunately that hole pattern is unique to the Radical 2.0 and won't match any other toe, heel, or adjustment plate. We do sell the toes and heels individually though, why not just carry another one of each of those if you're worried about something? Check our article about Binding Hole Patterns if you have any further questions.

Hi Scott, that's a hard thing to change. I'd just flip them up last!

Hi Michael, not this season unfortunately. And neither will the spring itself be available.

Hi Keith, send us a picture of your heel piece and we'll get it sorted through Dynafit. Yes, you can use the Turn heels with those toes and without re-drilling. No brakes, however. Pin heights are listed here.

Hi Michael, I'm told all stock in North America is v.4 with stronger screws, but no metal plate. Our inspections support that statement.

Hi William, thanks for the feedback! The heel pieces are priced individually, so you need Qty of 2 for a pair. The Radicals have 2 riser heights plus a flat-on-ski position, so maybe that counts as three.