Short answer
The Saucony Endorphin Speed 5 establishes a new benchmark for the 'super-trainer' category, balancing a true-to-size (TTS) reliability with a re-engineered Hexagon Mesh upper for optimized breathability and thermodynamic regulation. Runs true to size; order your regular running shoe size.
Runs true to size
Cross-sizing: what size to buy
Find a shoe you already own and read across to the Saucony Endorphin Speed 5 size to buy.
| Reference Shoe | US | EU | ||
|---|---|---|---|---|
| Your usual | Buy | Your usual | Buy | |
| Nike Air Force 1 | 10 | 10.5 | 44 | 44.5 |
| Adidas Samba | 10 | 10.5 | 44 | 44.5 |
| Nike Pegasus 41/42 | 10 | 10 | 44 | 44 |
| ASICS Superblast 2 | 10 | 10 | 44 | 44 |
-
Nike Air Force 1
Your usual Buy US 10 10.5 EU 44 44.5 -
Adidas Samba
Your usual Buy US 10 10.5 EU 44 44.5 -
Nike Pegasus 41/42
Your usual Buy US 10 10 EU 44 44 -
ASICS Superblast 2
Your usual Buy US 10 10 EU 44 44
Fit Notes
- Nike Air Force 1
- The Nike Air Force 1 runs notoriously large compared to standard performance trainers. Because the Saucony Speed 5 utilizes a technical racing last, a half-size jump is required to match the internal length and ensure the toes do not impact the front of the shoe during the aggressive SPEEDROLL toe-off.
- Adidas Samba
- Sambas are characterized by a flat, exceptionally narrow profile. While the Speed 5 offers superior width, its significant vertical volume and rocker geometry necessitate more longitudinal space than a flat lifestyle shoe. A half-size increase provides the necessary clearance for foot swelling and dynamic movement.
- Nike Pegasus 41/42
- The Pegasus line is known for a narrower, more restrictive toe box that often forces users to size up. The Endorphin Speed 5 offers more generous internal volume in the same numeric length, meaning those who wear a snug US 10 in the Pegasus will find the Speed 5 to be a perfect, more accommodating fit at the same size.
- ASICS Superblast 2
- Both shoes are performance-oriented 'stable neutral' trainers with very similar length profiles. While the Superblast 2 has a more maximalist, voluminous feel, the internal length remains consistent between the two, allowing for a 1:1 size transition.
Sizing FAQ
Does the Saucony Endorphin Speed 5 run true to size?
Yes, the general consensus is that the Saucony Endorphin Speed 5 fits true to size (TTS) for approximately 85% of runners. It shares a consistent length profile with Saucony's neutral daily trainers, though the aggressive rocker may make the shoe feel slightly shorter during dynamic movement, leading a small minority to prefer a half-size increase.
Is the Saucony Endorphin Speed 5 good for wide feet?
The Speed 5 is the most wide-foot friendly iteration in the series, featuring increased vertical clearance in the toe box and a less aggressive lateral taper. For runners with true 2E needs, Saucony has officially released a dedicated 'Wide' version, which is recommended over simply sizing up in the standard D-width to avoid midfoot constriction from the internal gusset.
How is the arch support on the Saucony Endorphin Speed 5?
The shoe provides a neutral arch profile without aggressive medial posts. However, the redesigned nylon plate features a medial wing that adds structural integrity, offering additional support for the arch as a runner fatigues. Its deep heel cup and 4.7 mm removable insole also make it highly compatible with custom medical-grade orthotics.
Specs & Sizing
| Weight | 276 g |
|---|---|
| Retail price | $180 |
| Price on Amazon | $150–$180 |
| Release year | 2024 |
| Upper | Lightweight engineered mesh with TPU overlays for breathability and secure lockdown |
| Midsole | Dual-density EVA-based foam stack (no proprietary race foam) |
| Outsole | Durable rubber placed in high-wear zones (forefoot and heel) for extended life |
| Technologies | Full-length carbon fiber composite plate, Medial post for mild stability, PWRRUN PB-inspired geometry without the foam |
| Fit & sizing | Runs true to size; order your regular running shoe size |