The Adidas Adizero Prime X3 Strung is a road running shoe and the Saucony Guide 19 is a stability road running shoe. The Adizero Prime X3 Strung sits higher off the ground (49 mm vs 35 mm heel stack) and is rated higher by buyers (4.7 vs 4.3 out of 5). The Guide 19 is 0.4 oz lighter (9.7 oz vs 10.1 oz) and costs about $18 less (from $150).
Specs side by side
| Spec | Adizero Prime X3 Strung | Guide 19 |
|---|---|---|
| Price | $168 | $150 |
| Rating | 4.7 / 5 (302 reviews) | 4.3 / 5 (165 reviews) |
| Weight | 10.1 oz | 9.7 oz |
| Heel-to-toe drop | 6 mm | 6 mm |
| Heel stack height | 49 mm | 35 mm |
| Cushioning | — | Max |
| Support | — | Stability |
| Surface | Road | Road |
| Available for | Men & Women | Men & Women |
Specs and prices from Adidas and Saucony, checked 2026-10-11. Weight is usually for a men's size 9–10.
Which should you get?
Get the Adizero Prime X3 Strung if…
- you want more foam under your heel
Get the Guide 19 if…
- you want the lighter shoe
- you want to spend less
- you like feeling closer to the ground
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