The Adidas Adizero SL 2 and Saucony Endorphin Pro 5 Speed-lace are both neutral road running shoes with moderate cushioning. The Adizero SL 2 costs about $198 less (from $52). The Endorphin Pro 5 Speed-lace sits higher off the ground (39.5 mm vs 36 mm heel stack).
Bottom line: Pick the Adizero SL 2 if you want to spend less; pick the Endorphin Pro 5 Speed-lace if you want more foam under your heel.
Specs side by side
| Spec | Adizero SL 2 | Endorphin Pro 5 Speed-lace |
|---|---|---|
| Price | $52 | $250 |
| Rating | 4.7 / 5 (475 reviews) | 4.7 / 5 (3 reviews) |
| Weight | 8.4 oz | — |
| Heel-to-toe drop | 9 mm | 8 mm |
| Heel stack height | 36 mm | 39.5 mm |
| Cushioning | Moderate | Moderate |
| Support | Neutral | Neutral |
| Plate | None | Carbon |
| Surface | Road | Road |
| Available for | Men | Men & Women |
Specs and prices from Adidas and Saucony, checked 2026-11-02. Weight is usually for a men's size 9–10.
Which should you get?
Get the Adizero SL 2 if…
- you want to spend less
- you like feeling closer to the ground
Get the Endorphin Pro 5 Speed-lace if…
- you want more foam under your heel
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