ShoesSalomonS/Lab Genesis Spine

Salomon

Salomon S/Lab Genesis Spine

Salomon S/Lab Genesis Spine. 31.9mm stack, 249g. Retailer specs verified on Running Warehouse.

PR Run Verified
Soft trailsLong ultrasDaily training

PR Run scores

Grip3/5
Cushion4/5
Protection2/5
Durability3/5
Versatility3/5

PR Run derived fit scores

69Great

100-miler readiness

Will this shoe survive a hundred-mile night? 31.9 mm stack, cushion 4/5

69Great

Descent tolerance

Does it save your toenails on long descents? 24.1 mm forefoot, heel counter 2/5

100Elite

Swelling room

Room to grow when your feet swell? 25.1 mm toebox height

78Great

Grit resistance

Does dust stay outside the shoe? 50 BR breathability

61Solid

Hot-day comfort

How well does it breathe in heat? 50 BR / 42% drying

71Great

Achilles-friendly

Kind to a cranky achilles? 7.8 mm drop, heel counter 2/5

Full specs

Drop

7.8 mm

Heel stack

31.9 mm

Forefoot stack

24.1 mm

Weight

249 g

Lug depth

4.3 mm

Plate

No

Waterproof

No

Lab measurements

MeasurementValue
Traction (CoF)0.55
Breathability50 BR
Drying potential42 %
Flexibility13.8 N
Torsional rigidity13.40 Nm
Heel counter2/5
Energy return55.6 %
Shock absorption121 SA
Midsole softness36.9 HA
Outsole thickness1.2 mm
Tongue padding10.5 mm
Insole removableYes
Insole thickness4.0 mm
Reflective elementsNo

Lab numbers from RunRepeat. Sources.

Fit intelligence

Toebox width

Narrow toebox (74.8 mm vs 96 mm median)

Toebox height

Category-average height (25.1 mm vs 25 mm median)

True to size.

Fit numbers from the lab. Swell guidance: foot care.

Questions before you race

Is the Salomon S/Lab Genesis Spine good for 100-mile races?

Great. 31.9 mm stack, cushion 4/5. 100-miler readiness score 69/100.

Does the Salomon S/Lab Genesis Spine fit wide feet?

No. Toebox is 74.8 mm which is narrow. Look elsewhere if you need width.

What is the drop on the Salomon S/Lab Genesis Spine?

7.8 mm, with a 31.9 mm heel stack and 24.1 mm forefoot.

Is the Salomon S/Lab Genesis Spine good on wet rock?

Traction coefficient of friction on wet lab surface: 0.55. Elite grip on wet rock.

Retailer listing

New lab data on soft trails shoes, once a month.

You will get one email per month with new lab data on soft trails shoes. No hype. Unsubscribe in one click.

Find shoes for your race

Image: Running Warehouse product photo

Specs: manufacturer. Verified Sep 4, 2026.

Report inaccurate data: hi@pr.run. Data sources.

Salomon S/Lab Genesis Spine Review, Specs, and Fit (2026) | PR Run