The Adidas Runfalcon 6 is a neutral road running shoe and the Adidas Ultraboost 5X is a road running shoe. The Runfalcon 6 costs about $57 less (from $33). The Ultraboost 5X is 0.3 oz lighter (9.7 oz vs 10 oz) and sits higher off the ground (39 mm vs 36 mm heel stack).
Specs side by side
| Spec | Runfalcon 6 | Ultraboost 5X |
|---|---|---|
| Price | $33–$52 | $90–$99 |
| Rating | 4.6 / 5 (75 reviews) | 4.6 / 5 (2,104 reviews) |
| Weight | 10 oz | 9.7 oz |
| Heel-to-toe drop | 10 mm | 10 mm |
| Heel stack height | 36 mm | 39 mm |
| Cushioning | Max | — |
| Support | Neutral | — |
| Surface | Road, Track | Road |
| Available for | Men & Women | Men & Women |
Specs and prices from Adidas, checked 2026-10-11. Weight is usually for a men's size 9–10.
Which should you get?
Get the Runfalcon 6 if…
- you want to spend less
- you like feeling closer to the ground
Get the Ultraboost 5X if…
- you want the lighter shoe
- you want more foam under your heel
- you want the more widely reviewed shoe
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