ShoesDiadoraNucleo 2

Diadora

Diadora Nucleo 2

Diadora Nucleo 2. 38.7mm stack, 276g. Retailer specs verified on Running Warehouse.

PR Run Verified
Soft trailsLong ultrasDaily training

PR Run scores

Grip3/5
Cushion5/5
Protection2/5
Durability3/5
Versatility3/5

PR Run derived fit scores

79Great

100-miler readiness

Will this shoe survive a hundred-mile night? 38.7 mm stack, cushion 5/5

98Elite

Descent tolerance

Does it save your toenails on long descents? 30.7 mm forefoot, heel counter 3/5

100Elite

Swelling room

Room to grow when your feet swell? 25.6 mm toebox height

100Elite

Grit resistance

Does dust stay outside the shoe? 3 BR breathability

22Weak

Hot-day comfort

How well does it breathe in heat? 3 BR / ?% drying

62Solid

Achilles-friendly

Kind to a cranky achilles? 8 mm drop, heel counter 3/5

Full specs

Drop

8 mm

Heel stack

38.7 mm

Forefoot stack

30.7 mm

Weight

276 g

Plate

No

Waterproof

No

Lab measurements

MeasurementValue
Traction (CoF)0.47
Breathability3 BR
Flexibility15.0 N
Torsional rigidity11.90 Nm
Heel counter3/5
Energy return47.8 %
Shock absorption132 SA
Outsole thickness2.5 mm
Tongue padding9.9 mm
Insole removableYes
Insole thickness7.8 mm
Reflective elementsYes

Lab numbers from RunRepeat. Sources.

Fit intelligence

Toebox width

Narrow toebox (72.0 mm vs 96 mm median)

Toebox height

Category-average height (25.6 mm vs 25 mm median)

True to size.

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

Questions before you race

Is the Diadora Nucleo 2 good for 100-mile races?

Great. 38.7 mm stack, cushion 5/5. 100-miler readiness score 79/100.

Does the Diadora Nucleo 2 fit wide feet?

No. Toebox is 72.0 mm which is narrow. Look elsewhere if you need width.

What is the drop on the Diadora Nucleo 2?

8 mm, with a 38.7 mm heel stack and 30.7 mm forefoot.

Is the Diadora Nucleo 2 good on wet rock?

Traction coefficient of friction on wet lab surface: 0.47. Solid grip on wet rock.

Manufacturer specs · Retailer listing

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Image: Running Warehouse product photo

Specs: retailer. Verified Sep 2, 2026.

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

Diadora Nucleo 2 Review, Specs, and Fit (2026) | PR Run