Freeflex: room for ski flex
The heel can move back as the ski bends, reducing the binding’s influence on the natural flex of the ski.
18% off
HEAD Freeflex ST 20 X RD ski binding
The HEAD Freeflex ST 20 X RD ski binding pairs a Stream toe with the RACE PRO RD heel for direct power transfer. Its high 10.5–20 adjustment range requires a matching skier and equipment setup. Its Freeflex system reduces the binding’s influence on ski flex, an important part of a matched performance setup.
Sale price
€385,00 EUR
Regular price
€470,00
Tax included
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By
Head
Free shipping in Germany for orders over €150
Delivery time within Germany in 2 to 4 business days
Free pickup in Gilching
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Pickup available at Brucker Str. 49
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HEAD FREEFLEX ST 20X RD BR.85 [A]m.bk/sp
HEAD Freeflex ST 20 X RD
Race binding for technical events
For experienced racers requiring a high adjustment range, particularly in technical events.
Adjustment range: 10.5–2085 mmFreeflex
Technical specifications
- Model
- HEAD Freeflex ST 20 X RD
- Adjustment range
- 10.5–20
- Brake width
- 85 mm
- Boot compatibility
- Alpine ISO 5355 Type A; no GripWalk
- Technology
- Stream Toe · AFD ST POM (X) · Freeflex Pro · RACE PRO RD
- Construction
- Freeflex system with a moving heel
- Who it is for
- For experienced racers requiring a high adjustment range, particularly in technical events.
- Intended use
- Race training and competition, technical disciplines
HEAD Freeflex ST 20 X RD ski binding: technology and feel
RD versus RS
The RD heel focuses on direct power transfer; the RS version takes a more progressive approach for speed events. Choose around the intended discipline and setup.
Consider the whole setup
Ski, plate, binding and boot must work together. Before purchase, we check the existing plate and the boot sole length.
Control starts with the right setup
The RD heel is designed for direct power transmission in technical racing. If your gate skiing relies on deliberate changes of pressure, that response is an important selection criterion. The Stream toe uses independently operating pincers, while Freeflex allows the heel to move as the ski bends.
What matters on snow
- Building the turn: The ski needs to bend under load. Freeflex reduces the restriction imposed by the binding, allowing the ski to work through the turn.
- Power transmission: A compatible boot, binding and plate help deliver precise inputs to the edge. Matching the components matters more than the highest DIN number.
- Stability on hard snow: Gate training and committed carving call for clear feedback. Edge preparation, ski flex and a well-fitting boot all play a substantial part in that feel.
Our buying advice: race binding or recreational model?
Our recommendation: experienced racers whose individually determined setting actually falls within 10.5–20. Discuss your discipline and race plate with us. For lower settings, consider the ST 14 or ST 16; for speed disciplines, compare the 20 X RS. A high maximum setting alone is no reason to choose this model.
For regular race training, choose a binding whose construction suits your race plate and the response you want. For relaxed piste skiing, a compatible recreational binding may be the more sensible choice. A race binding earns its place as part of a matched system; a higher price or adjustment range does not automatically produce more edge grip.
How to assess construction and weight
For a race setup, we prioritise the right heel response, ski-flex function and plate compatibility over the lowest possible weight. Compare weights only for matching versions, and check whether a figure refers to one binding or a pair. Lower weight does not automatically mean greater precision, and higher weight does not automatically mean greater stability.
Check before buying
- Ski and plate: exact model and intended binding interface.
- Boot: sole standard, sole length and condition of the contact surfaces.
- Skier and use: required adjustment range, training or competition, and discipline.
Use & selection
For advice, bring the exact ski model, plate details and your ski boots. We match these to your intended use. The model number is not your personal release setting and does not replace determining that setting or testing the system.
Mounting and function check
Have a specialist workshop mount the binding, match it to the sole length, set it and test it with your boot. A change of boots requires a fresh check of the combination. Keep contact surfaces clean and have unusual play or damaged parts inspected. For binding advice, bring your skis and both boots, and discuss the required work with us in advance.
Seven questions about the HEAD Freeflex ST 20 X RD
Who is the HEAD Freeflex ST 20 X RD designed for?
For experienced racers requiring a high adjustment range, particularly in technical events.
What does Freeflex do?
The heel can move back as the ski bends, reducing the binding’s influence on the natural flex of the ski.
Which boots are compatible?
This model is intended for Alpine soles complying with ISO 5355 Type A, not GripWalk or Type C children’s soles. Check the marking on the actual boot and have the combination checked by a workshop.
What distinguishes this model?
The RD heel focuses on direct power transfer; the RS version takes a more progressive approach for speed events. Choose around the intended discipline and setup.
Does the 85 mm brake fit my ski?
The version offered has an 85 mm brake. We check compatibility with your ski and mounting plate using the exact setup. Brake width alone does not confirm full compatibility.
Can I use the model number as my release setting?
No. The 10.5–20 range describes the binding’s adjustment options. A specialist workshop must determine your personal setting and check the function with your boots.
Can SF Sports help with selection and mounting?
Yes. In Gilching, we advise on the right combination and arrange mounting, adjustment and further race service work with you. Contact us first so we can take your existing equipment into account.
Why buy this ski binding from SF Sports?
Advice informed by racing
We advise racers, parents, coaches and Masters on combining skis, plates, bindings and boots. You get a recommendation for your use, rather than simply a higher model number.
Workshop in Gilching
In Gilching you have a personal contact for product selection and workshop questions. Our race service complements your setup with suitable edge, base and structure preparation.
A coordinated setup
We compare suitable HEAD models with you and discuss boot compatibility and service requirements. For young racers in particular, we consider their existing equipment and actual needs together.
Matching equipment and service
Compare HEAD ski bindings by use and sole standard. Boot fit and ski preparation also contribute to a coherent setup. Find advice, bootfitting and race service for your equipment here.