ShoesadidasTerrex Swift R3 GTX

adidas

adidas Terrex Swift R3 GTX

adidas Terrex Swift R3 GTX. 36.6mm stack, 408g. Retailer specs verified on Running Warehouse.

PR Run Verified
Soft trailsLong ultrasDaily training

PR Run scores

Grip3/5
Cushion5/5
Protection4/5
Durability4/5
Versatility3/5

PR Run derived fit scores

94Elite

100-miler readiness

Will this shoe survive a hundred-mile night? 36.6 mm stack, cushion 5/5

86Elite

Descent tolerance

Does it save your toenails on long descents? 20.7 mm forefoot, heel counter 4/5

100Elite

Swelling room

Room to grow when your feet swell? 27.7 mm toebox height

100Elite

Grit resistance

Does dust stay outside the shoe? 2 BR breathability

22Weak

Hot-day comfort

How well does it breathe in heat? 2 BR / ?% drying

15Weak

Achilles-friendly

Kind to a cranky achilles? 15.9 mm drop, heel counter 4/5

Full specs

Drop

15.9 mm

Heel stack

36.6 mm

Forefoot stack

20.7 mm

Weight

408 g

Lug depth

4.4 mm

Plate

No

Waterproof

No

Lab measurements

MeasurementValue
Breathability2 BR
Flexibility39.1 N
Heel counter4/5
Energy return53.0 %
Shock absorption87 SA
Softness in cold17 %
Outsole thickness2.0 mm
Tongue padding10.9 mm
Insole removableYes
Insole thickness4.9 mm
Reflective elementsNo

Lab numbers from RunRepeat. Sources.

Fit intelligence

Toebox width

Narrow toebox (68.9 mm vs 96 mm median)

Toebox height

Slightly tall (27.7 mm vs 25 mm median)

True to size.

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

Questions before you race

Is the adidas Terrex Swift R3 GTX good for 100-mile races?

Elite. 36.6 mm stack, cushion 5/5. 100-miler readiness score 94/100.

Does the adidas Terrex Swift R3 GTX fit wide feet?

No. Toebox is 68.9 mm which is narrow. Look elsewhere if you need width.

What is the drop on the adidas Terrex Swift R3 GTX?

15.9 mm, with a 36.6 mm heel stack and 20.7 mm forefoot.

Is the adidas Terrex Swift R3 GTX good on wet rock?

Lab traction has not been measured for this model yet.

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Image: adidas product photo

Specs: manufacturer. Verified Sep 4, 2026.

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

adidas Terrex Swift R3 GTX Review, Specs, and Fit (2026) | PR Run