Short answer
The Adidas Solarboost 5 is a versatile high-performance daily trainer that masterfully balances a snug, secure midfoot lockdown with significant lateral relief in the forefoot. Featuring an unusually accommodating toe box and the advanced Light Boost midsole, this model provides a stable, energized ride for those seeking a true-to-size (TTS) fit.
Runs small · consider sizing up
Cross-sizing: what size to buy
Find a shoe you already own and read across to the Adidas Solarboost 5 size to buy.
| Reference Shoe | US | EU | ||
|---|---|---|---|---|
| Your usual | Buy | Your usual | Buy | |
| Nike Pegasus 40/41 | 10 | 10 | 44 | 44 |
| Nike Air Force 1 | 9.5 | 10 | 43 | 44 |
| Adidas Samba OG | 10.5 | 10 | 44.5 | 44 |
| Brooks Ghost 15/17 | 10 | 10 | 44 | 44 |
-
Nike Pegasus 40/41
Your usual Buy US 10 10 EU 44 44 -
Nike Air Force 1
Your usual Buy US 9.5 10 EU 43 44 -
Adidas Samba OG
Your usual Buy US 10.5 10 EU 44.5 44 -
Brooks Ghost 15/17
Your usual Buy US 10 10 EU 44 44
Fit Notes
- Nike Pegasus 40/41
- The Nike Pegasus typically runs narrower and slightly shorter in the internal chamber. While the length is comparable, the Solarboost 5 provides a more generous forefoot width, meaning you do not need to size up to achieve lateral comfort as you might in a Pegasus.
- Nike Air Force 1
- The Air Force 1 is notorious for running large in both length and volume. If you size down 0.5 in lifestyle sneakers like the AF1, you must return to your true performance size (US 10) for the Solarboost 5 to ensure proper toe clearance during the gait cycle.
- Adidas Samba OG
- The Samba uses a very narrow, rigid leather last that often forces users to size up by 0.5 just to accommodate width. Because the Solarboost 5 is built with an accommodating 100.2 mm toe box, you should avoid 'sizing up for width' and instead choose your true anatomical length.
- Brooks Ghost 15/17
- Both shoes are consistent industry-standard true-to-size (TTS) trainers. The Solarboost 5 will offer a similar length to the Ghost but will feel more structured and 'locked-in' through the midfoot due to the non-stretch TFP fibers.
Sizing FAQ
Does the Adidas Solarboost 5 run true to size?
Yes. Lab testing and community consensus confirm that the Solarboost 5 fits true to size (TTS). It provides a consistent internal length and width that aligns with standard Adidas performance sizing, though its firmer midsole ensures internal volume remains consistent throughout long runs.
Is the Adidas Solarboost 5 good for wide feet?
The Solarboost 5 is excellent for wide-footed runners, specifically in the forefoot where it measures 100.2 mm at the widest point. However, because the midfoot features non-stretch Tailored Fiber Placement (TFP) stitching, runners with a true 2E or wider midfoot profile may prefer a half-size increase to avoid pressure.
How is the arch support on the Adidas Solarboost 5?
It provides 'inherent stability' suitable for neutral runners and mild overpronators. This is achieved via a wide platform and 'Solar Propulsion Rails' that cradle the foot. The Light Boost foam is firm enough (33.5 HA) to resist collapsing under the arch, maintaining structural integrity over time.
Specs & Sizing
| Weight | 298 g |
|---|---|
| Retail price | $140 |
| Price on Amazon | $95–$140 |
| Release year | 2023 |
| Upper | Primeknit / Mono Mesh with minimum 50% recycled content |
| Midsole | Light BOOST foam |
| Outsole | Continental™ Rubber |
| Technologies | Light BOOST cushioning, Recycled Primeknit upper, Continental™ Rubber outsole, 10mm heel-to-toe drop |
| Fit & sizing | Runs inconsistently; many users recommend going up half a size, especially for wider feet or thicker socks. |