Saucony
Saucony Xodus Ultra 4
Saucony Xodus Ultra 4. 37.6mm stack, 312g. Retailer specs verified on Running Warehouse.
PR Run scores
PR Run derived fit scores
100-miler readiness
Will this shoe survive a hundred-mile night? 37.6 mm stack, cushion 5/5
Descent tolerance
Does it save your toenails on long descents? 31.1 mm forefoot, heel counter 4/5
Swelling room
Room to grow when your feet swell? 24.5 mm toebox height
Grit resistance
Does dust stay outside the shoe? 3 BR breathability
Hot-day comfort
How well does it breathe in heat? 3 BR / ?% drying
Achilles-friendly
Kind to a cranky achilles? 6.5 mm drop, heel counter 4/5
Full specs
Drop
6.5 mm
Heel stack
37.6 mm
Forefoot stack
31.1 mm
Weight
312 g
Lug depth
3.5 mm
Plate
No
Waterproof
No
Lab measurements
| Measurement | Value |
|---|---|
| Traction (CoF) | 0.72 |
| Breathability | 3 BR |
| Flexibility | 15.3 N |
| Torsional rigidity | 14.40 Nm |
| Heel counter | 4/5 |
| Energy return | 64.9 % |
| Shock absorption | 127 SA |
| Midsole softness | 35.0 HA |
| Outsole thickness | 2.1 mm |
| Tongue padding | 7.9 mm |
| Insole removable | Yes |
| Insole thickness | 6.0 mm |
| Reflective elements | No |
Fit intelligence
Toebox width
Narrow toebox (71.6 mm vs 96 mm median)
Toebox height
Category-average height (24.5 mm vs 25 mm median)
Runs small. Consider a half size up.
Fit numbers from the lab. Swell guidance: foot care.
Questions before you race
Is the Saucony Xodus Ultra 4 good for 100-mile races?
Elite. 37.6 mm stack, cushion 5/5. 100-miler readiness score 89/100.
Does the Saucony Xodus Ultra 4 fit wide feet?
No. Toebox is 71.6 mm which is narrow. Look elsewhere if you need width.
What is the drop on the Saucony Xodus Ultra 4?
6.5 mm, with a 37.6 mm heel stack and 31.1 mm forefoot.
Is the Saucony Xodus Ultra 4 good on wet rock?
Traction coefficient of friction on wet lab surface: 0.72. Elite grip on wet rock.
Manufacturer specs · Retailer listing
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swellingRoom: 100/100 (Elite)
descentTolerance: 98/100 (Elite)
gritIngressRisk: 96/100 (Elite)
hotFootScore: 22/100 (Weak)
achillesFriendlyScore: 62/100 (Solid)
hundredMilerReadiness: 89/100 (Elite)