Built for uncompromising piste performance, the RC4 Carbon Pro LV BOA 130+ is Fischer’s answer for expert skiers with narrow feet who demand absolute precision at speed. Every element of this boot is engineered to convert intent into edge grip—instantly, efficiently, and without compromise.
The narrow low-volume last locks the foot in place, while the 130+ flex delivers race-inspired responsiveness for aggressive carving and maximum energy transfer. At the heart of the boot, the CARBONFUSED® Alpine cuff reinforces the structure with carbon fiber, providing exceptional torsional rigidity and rebound while keeping weight in check.
Fit and comfort are elevated by the RC4 ZipFit® Innerboot, which adapts dynamically through a cork composite blend. It molds precisely to your foot over time, improving heel hold, increasing control, and even adding stiffness—without sacrificing warmth thanks to its Merino-lined toe box.
The BOA® H+i1 Fit System replaces traditional buckles with micro-adjustable shell wrapping, evenly distributing pressure and allowing on-the-fly fine tuning. Combined with RD20 Race Canting, SOMA TEC® stance geometry, and a GripWalk® sole, this boot delivers race-level power with modern usability.
This is precision engineering for skiers who ski fast, ski hard, and expect their equipment to keep up—lap after lap.
CARBONFUSED® Alpine Cuff
Pebax® Rnew cuff reinforced with carbon fibers for maximum stiffness, rebound, and stability at high speeds.
BOA® Fit System – H+i1
High-power BOA® system engineered specifically for alpine boots, ensuring superior shell wrapping, balanced pressure distribution, and precise micro-adjustments.
RC4 ZipFit® Innerboot
Cork composite liner adapts to your foot for a customized, locked-in fit while adding warmth and increasing flex performance over time.
SOMA TEC® Stance
Slightly abducted natural stance improves balance, control, and joint-friendly skiing efficiency.
RD20 Race Canting
Advanced canting system minimizes play between cuff and shell, maximizing edge precision and power transmission.
GripWalk® Sole (ISO 23223)
Enhanced walking comfort and grip without sacrificing downhill performance or binding compatibility.
Grindable Bootboard
Allows professional bootfitters to fine-tune ramp angle and height with precision.
Fit: Narrow (Low Volume)
Last Width: 96 mm
Sole Length: 296 mm
Flex: 130+
Skill Level: Expert
Activity: Piste
Sole: GripWalk®
Binding Compatibility: GripWalk®
Closure System: BOA® Fit System
BOA Lace Length: 450 mm
Power Strap: 50 mm Power Strap with QuickFix Cam
Cuff Fixation / Canting: RD20 Race Canting
Liner: RC4 ZipFit® (Black)
Ski boots are sized in Mondopoint, based on the length of your foot in centimeters. The chart below is a general reference for converting between sizing systems.
This chart is not a fitting. The only way to know your ski boot size is to be fit in person, either with a Boot Fitting at our shop or from a professional fitting you have had elsewhere. Sizing, shape, and volume vary by brand and model, and a performance fit is snugger than your street shoe. Unworn boots can be returned under our return policy, but a boot that doesn't fit can be a big hassle for your trip if you haven't tried it on.
| Mondo (cm) | US Men's | US Women's | EU |
|---|---|---|---|
| 22/22.5 | 4/4.5 | 5/5.5 | 35 |
| 23/23.5 | 5/5.5 | 6/6.5 | 36/37 |
| 24/24.5 | 6/6.5 | 7/7.5 | 38 |
| 25/25.5 | 7/7.5 | 8/8.5 | 39/40 |
| 26/26.5 | 8/8.5 | 9/9.5 | 41 |
| 27/27.5 | 9/9.5 | 10/10.5 | 42/43 |
| 28/28.5 | 10/10.5 | 11/11.5 | 44 |
| 29/29.5 | 11/11.5 | – | 45/46 |
| 30/30.5 | 12/12.5 | – | 47 |
| 31/31.5 | 13/13.5 | – | 48/49 |
| 32/32.5 | 14/14.5 | – | 50 |
Conversions are approximate and can differ by half a size between brands.
Ski boots are built with one shell for each full and half size, so a 27 and a 27.5 are the same boot with a different liner or footboard. That is why sizes are listed together, like 27/27.5.
Very few models differ from this. Scarpa is the main exception, pairing sizes the other way (for example, 26.5/27 share a shell). When a model is sized differently, we call it out on that product's page.
Book a Boot Fitting with our team at (802) 253-4531. Preliminary boot work is included with every boot purchase.
Find out more about who we are any why love skiing and riding here in Vermont
Follow us for events, backcountry news and loads of other MountainOps fun
Shipping, returns, sizing, and the details that make getting out easier.
