What does the Calf Adjuster do?

The three-position Calf Adjuster modifies the cuff shape to accommodate narrow, medium, or wide calves. It is a riveted pivot that changes leg alignment inside the boot for better comfort and edge control.

How does this compare to the S/PRO Supra BOA?

The Delta BOA has a wider 102mm last and simpler construction at a lower price. The Supra BOA has a 100mm last, ExoWrap construction, Custom Shell HD, and premium liner — it is a more precise, higher-performance boot for medium-volume feet.

Is GripWalk included or sold separately?

GripWalk soles come pre-mounted on the S/PRO Delta BOA 100 GW — no separate purchase needed.

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Salomon

Salomon S/Pro Delta BOA 100 GW

$363.97$519.95

Boots Return Policy

All boots are subject to a 5% restocking fee if returned. Please ensure correct sizing before purchasing — contact us for help with fit.

Color: Black / Black / Titanium Met. Pd

Size: 27/27.5

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Description

The S/PRO DELTA BOA 100 GW sits in the middle of Salomon's all-mountain S/PRO line — a flex-100 boot built on a 102mm last, which puts it squarely in high-volume territory. That wider forefoot and higher instep give skiers with meaty feet room to breathe without sacrificing heel hold, because the lower shell uses a single BOA dial to cinch the forefoot with micro-precise, even tension all the way around — no pressure points, no localized hotspots from a single buckle cam. The upper cuff then closes with two aluminum buckles, letting you tune forward lean and calf pressure independently. The My Custom Fit 3D Perf liner is heat-moldable off the shelf, and the shell itself is built with Custom Shell HD technology — meaning a bootfitter can spot-punch or heat-mold problem areas in minutes without wrecking the shell's integrity. There is no mechanical walk/hike mode toggle, but the pre-mounted GripWalk ISO soles (ISO 23223) give you enough traction and rocker underfoot to move comfortably between lodge and lift without hobbling. On snow, the 100-flex Power Spine construction delivers a responsive, predictable rebound — not harsh, but not noodle-soft either.

This boot makes sense for an intermediate-to-advanced skier — someone who's comfortable on blues, working into blacks, maybe tackling groomed steeps or occasional off-piste — who also has a wide or high-volume foot that has historically been pinched by standard 98mm or narrower lasts. If your foot is narrow or low-volume, the Delta BOA will feel sloppy no matter how tight you dial the BOA, and you'll lose the edge response you paid for — the S/PRO Alpha BOA or S/PRO 100 on a 98mm last is a better match. Conversely, if you're an expert or aggressive charger generating serious force, this flex-100 shell will start to wash out at speed; step up to the 110 or 120 in the same line. The calf adjuster handles wide and narrow legs well, but if you have an unusually high calf, come in and try it before you buy — that's a fit problem no BOA dial can solve. As always, boot fit is a real conversation, not a size chart lookup: come in, bring your footbed if you have one, and we'll sort out whether this shell geometry actually matches your foot.

Flex	100 (medium-stiff)
Fit	102mm HV
Closure	Single BOA lower + 2 cuff buckles
Liner	My Custom Fit 3D Perf + Custom Shell HD - heat-moldable
Walk / Sole	No walk mode; GripWalk soles
Best For	Intermediate-advanced, wide foot

Details

Type: Ski Boots
Vendor: Salomon
SKU: L47931300-27/27.5

PTO ReviewSki Boots

Salomon S/PRO Delta BOA 100 GW

S/PRO Delta family · 25/26BOAWalk Mode

Flex 100

Stiff

60708090100110120130

SofterStiffer

Last Width

102mm— Wide (102mm+)

The S/PRO Delta BOA 100 GW is Salomon's all-mountain boot for intermediate skiers with wider feet who want modern convenience. The BOA Fit System on the lower shell provides micro-adjustable, even pressure across the forefoot — no more cranking buckles with frozen fingers. The 102mm last is wide enough for broader feet without being sloppy, and the three-position Calf Adjuster lets you customize the cuff fit across different calf shapes.

At $364, it packs a lot of features: walk mode, pre-mounted GripWalk sole, BOA, and calf adjustment. Compared to the Atomic Hawx Prime 100 BOA at the same flex and BOA setup, the S/PRO Delta runs wider (102mm vs. 100mm) — so foot width is the deciding factor.

Strengths

+BOA Fit System for micro-adjustable lower shell fit with gloves on
+3-position Calf Adjuster accommodates different calf shapes
+Walk mode + GripWalk sole for practical off-snow mobility

Best For

Intermediate skiers with wider feet who want BOA convenience, walk mode, and a forgiving all-mountain boot.

Limitations

−BOA cable is a rare but real failure point in the field
−102mm last may be too loose for medium-volume feet — consider the S/PRO Supra (100mm)
−Flex 100 may feel soft for aggressive advanced skiers on hard snow

Not For

Medium-volume feet (look at S/PRO Supra BOA 100mm last), expert chargers (step up to S/PRO Supra Dual BOA 120/130), or budget buyers.

Common Questions

What does the Calf Adjuster do?: The three-position Calf Adjuster modifies the cuff shape to accommodate narrow, medium, or wide calves. It is a riveted pivot that changes leg alignment inside the boot for better comfort and edge control.
How does this compare to the S/PRO Supra BOA?: The Delta BOA has a wider 102mm last and simpler construction at a lower price. The Supra BOA has a 100mm last, ExoWrap construction, Custom Shell HD, and premium liner — it is a more precise, higher-performance boot for medium-volume feet.
Is GripWalk included or sold separately?: GripWalk soles come pre-mounted on the S/PRO Delta BOA 100 GW — no separate purchase needed.