The Adizero Boston 13 is adidas's do-everything long-run and tempo trainer — and runners ask the same thing before buying: does the Boston 13 run true to size?
We sell adidas running at West Coast Deals, so I've had the Boston 13 in hand. Here's the consensus answer and who should think twice.
Does the Adizero Boston 13 run true to size? The short answer
Yes — the Boston 13 runs true to size for most runners. The catch is shape, not length: it has a notably narrow heel and a more tapered toe box than the Boston 12. It's a race-leaning fit, snug rather than roomy. If you have a wide forefoot, that taper can feel confining on longer runs.
How it fits
I wear a US 11 with a wider-than-average foot. At true to size the length was spot-on and the lockdown was excellent — the narrow heel actually worked in my favor for hold — but I noticed the forefoot taper that reviewers mention, especially compared to the roomier Boston 12. For a standard or narrow foot, true to size is clearly the move. If you're wide, or you want extra toe splay for long mileage, going half a size up (or seeking a wide version) is the safer call. Coming from the Boston 12? The 13 feels a touch shorter and snugger.
What the Adizero Boston 13 is
The Boston 13 is a versatile long-run and tempo "super-trainer" with race DNA. The build is an engineered mesh upper over Lightstrike Pro stacked on firmer Lightstrike, with embedded Energy Rods (glass-fiber rods rather than a full plate) for propulsion. v13 added collar and tongue padding, so heel slip isn't an issue.
How it compares
The Boston sits between a daily trainer and a racer. For the lighter, single-foam sibling, see our Adizero Evo SL sizing guide; for the plush, casual end, the Ultraboost 1.0 sizing guide. Our adidas running shoes comparison lines them all up.
Final verdict
The Adizero Boston 13 is true to size. Standard and narrow feet will love the locked-in race fit; wider feet should account for the tapered toe box and consider half a size up. It's a snug shoe by design — that's the point.
We sell the Adidas Adizero Boston 13 at West Coast Deals, authenticated in-house and shipped from our Portland, Oregon warehouse. See the Black Adizero Boston 13 and browse more running shoes here.
— Anthony from West Coast Deals