ShoesUnder ArmourCharged Assert 9

Under Armour

Under Armour Charged Assert 9

Under Armour Charged Assert 9. 34mm stack, 290g. Retailer specs verified on Running Warehouse.

PR Run Verified
Soft trailsLong ultrasDaily training

PR Run scores

Grip3/5
Cushion5/5
Protection3/5
Durability3/5
Versatility3/5

PR Run derived fit scores

84Elite

100-miler readiness

Will this shoe survive a hundred-mile night? 34 mm stack, cushion 5/5

53Solid

Descent tolerance

Does it save your toenails on long descents? 23.1 mm forefoot stack

68Great

Swelling room

Room to grow when your feet swell? 34 mm heel stack

93Elite

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

56Solid

Achilles-friendly

Kind to a cranky achilles? 10.9 mm drop, heel counter 2/5

Full specs

Drop

10.9 mm

Heel stack

34 mm

Forefoot stack

23.1 mm

Weight

290 g

Plate

No

Waterproof

No

Lab measurements

MeasurementValue
Breathability3 BR
Heel counter2/5
Outsole thickness4.9 mm
Tongue padding7.1 mm
Insole removableYes
Insole thickness4.4 mm
Reflective elementsNo

Lab numbers from RunRepeat. Sources.

Fit intelligence

True to size.

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

Questions before you race

Is the Under Armour Charged Assert 9 good for 100-mile races?

Elite. 34 mm stack, cushion 5/5. 100-miler readiness score 84/100.

Does the Under Armour Charged Assert 9 fit wide feet?

Toebox width has not been measured in the lab yet.

What is the drop on the Under Armour Charged Assert 9?

10.9 mm, with a 34 mm heel stack and 23.1 mm forefoot.

Is the Under Armour Charged Assert 9 good on wet rock?

Lab traction has not been measured for this model yet.

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Image: Under Armour product photo

Specs: manufacturer. Verified Sep 4, 2026.

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

Under Armour Charged Assert 9 Review, Specs, and Fit (2026) | PR Run