Dynafit Low Tech Race 105 Auto Lock — Review

Overview

The Dynafit Low Tech Race 105 Auto Lock is an ultralight tech/pin race binding built for blistering uphill efficiency and a direct, low‑stack feel on the descent. At just 108 g per binding, with a factory‑set release value (~8) and automatic toe locking, it’s a purpose‑built skimo tool that prioritizes speed, reliability, and simplicity over adjustability and comfort.

Who is it for?

Competitive skimo racers and weight‑focused tourers chasing every second and every gram.
Skiers who prefer a very low stand height and a crisp, precise ski feel.
Users with tech‑insert boots; not intended for alpine‑norm soles or resort charging.

On‑snow performance

Uphill and transitions

The extremely low stand height and 108 g weight make the LTR 105 remarkably quick on the climb. Auto Lock puts the toe into walk mode automatically, shaving seconds in transitions. Ice Breaker Pins clear ice from boot inserts for reliable step‑ins in cold, mixed conditions.

Descent

For its weight, power transfer is impressively direct thanks to forged 7075 aluminum and steel hardware. Expect minimal elastic travel; the fixed RV (~8) and race tune mean less forgiveness in choppy snow than heavier, adjustable touring bindings. That’s inherent to the category and suits its target user.

Features and specs explained

Type of binding: Tech/pin (frameless). The lightest approach for ski touring/racing with efficient climbing and precise power transfer.
DIN/release value: Fixed ~8 (lateral and vertical). No adjustment; predictable, race‑oriented release but less personalization to weight/style.
Elastic travel: Minimal/non‑adjustable. Maximizes precision and immediacy, with less damping and error tolerance on hard hits.
Brake width: Optional race brake ~68 mm. Helps ski retention in races; many racers still opt for leashes.
Weight: 108 g per binding (Auto). Every gram matters in skimo; this is top‑tier light.
Compatibility: Tech‑insert boots; optional 20 mm heel adjustment plate; crampon slot; optional Dynafit race brake. Pure tech‑boot focus with some mounting flexibility.
Materials: 7075 forged aluminum, stainless steel, POM/synthetics. High stiffness and durability at extremely low mass.
Notables: Auto toe lock, Ice Breaker Pins, long excenter for reliable exits, lowest stand height for direct ski feel.

Comparisons

ATK Trofeo/SL World Cup: Often slightly heavier (≈110–145 g) with similar fixed release race behavior; some systems offer a touch more heel adjustment via plates. Dynafit shines with auto toe‑lock and ultra‑low stack.
Plum Race 99: Even lighter on paper, with similar race focus. Dynafit counters with rock‑solid platform feel and proven ice management via Ice Breaker Pins.
Ski Trab Gara Titan: Comparable race weight with its own release character. Dynafit’s Auto Lock and transition ergonomics favor pure speed.

Drawbacks and caveats

No DIN adjustment: The fixed ~8 setting won’t suit everyone; body weight, style, and terrain should fit a race binding.
Limited elasticity: Less forgiving in chop/high‑speed hits than heavier touring bindings with more travel.
Brake option is narrow and optional: The ~68 mm race brake isn’t universal; leash setups demand discipline and safety awareness.
Not a resort charger: This isn’t designed for hard resort pounding or freeride duties.

Key takeaways

Ultralight and low: 108 g and minimal stack for pure uphill efficiency.
Fixed release (~8): Race consistency without adjustability.
Auto Lock + Ice Breaker Pins: Fast, reliable transitions and step‑ins.
Optional plate (20 mm): Enables limited heel length adjustment.

Frequently asked questions

Q: Is the fixed release value (~8) right for me?
A: For skimo racers, often yes, but it isn’t individualized. If you’re significantly lighter/heavier or want more elasticity, consider an adjustable touring binding.

Q: Do I need a brake on the Low Tech Race 105 Auto?
A: Not necessarily; many racers run a leash. An optional race brake (~68 mm) exists—factor in event rules, safety, and personal preference.

Q: Can I mount it on wider skis?
A: It’s designed for race/light touring skis. You can mount wider, but downhill behavior and brake compatibility are optimized for narrow, race‑oriented skis.