Adidas Boston 12 vs. Saucony Endorphin Speed 3 (2024)

Adidas Adizero Boston 12 vs Saucony Endorphin Speed 3

The Adidas Boston 12 and the Saucony Endorphin Speed 3 target the same use scenarios: fast training. They are shoes for speed work like tempo runs or interval training. You can also use them for most sessions if you’re a fast runner overall. Indeed, these shoes offer a unique blend of comfort and performance. But which one is best?

On paper, these two models are very similar. Similar stack height (38 mm for the Boston in the heel, 36 mm for the Endorphin Speed) and drop (7-8 mm)–it’s quite standard for such trainers with comfortable cushioning. Nonetheless, the underfoot feel is firmer on the Boston, which can be a plus if you’re looking for more stability.

The weight is the main difference: with 1.4 oz/40 g less, the Saucony is lighter. In practice, it doesn’t make a huge difference, but still, the Speed is just more nimble overall. Although Adidas streamlined its Boston 12 in 2023, it remains somewhat clunky.

In terms of ride, the Saucony Endorphin Speed 3 is the more responsive shoe despite using a nylon plate vs. multiple carbon plates (EnergyRods) for the Boston.

Lastly, the fit is a bit more tricky on the Boston. The midfoot can feel tight, especially if you have wide feet. On the other hand, the Endorphin Speed is relatively spacious and will fit most foot shapes and sizes.

Adidas Boston vs Saucony Endorphin Speed: Verdict

If you’re an Adidas fan, the Boston 12 will be a solid pick for you as you’ll get Adidas’ core technologies in a modern speed trainer package.

However, if you’re on the fence, we think the Saucony Endorphin Speed 3 will be the superior shoe. It’s a star model that just works and can magnify the training of most runners. Go Saucony!

Side-By-Side Comparison Table

9.1
Adidas Adizero Boston 12 Check Prices
9.5
Saucony Endorphin Speed 3 Check Prices
Overview
Description The Adizero Boston 12 is Adidas' super trainer for faster workouts. This new version comes with significant weight savings and a softer ride. The Saucony Endorphin Speed 3 is a nylon plated running shoe for comfortable and responsive faster runs.
Comfort
9
Responsiveness
9
Foot lockdown
9
Stability
9.5
Durability
9.5
Value
9
Design
9.5
Comfort
9.5
Responsiveness
9.5
Foot lockdown
9.5
Stability
9.5
Durability
9.5
Value
9
Design
9.5
Facts
TerrainRoadRoad
Support NeutralNeutral
Heel stack height38 mm36 mm
Forefoot stack height31 mm28 mm
Heel-to-toe drop7 mm8 mm
Weight (men)269 g229 g
Weight (women) 227 g204 g
Features Carbon-fiber plate, Recycled materials, RockerVegan, Recycled materials, Nylon plate
Athletes
Release year20232022
Technologies
Outsole Continental RubberXT-900
Midsole Lightstrike 2.0, Lightstrike Pro, EnergyRods 2.0 PWRRUN PB, Speedroll
UpperEngineered meshEngineered Mesh
Cushioning
Cushioning Firm Balanced
ResponsivenessMedium High
Use
DistanceMid, 10K, Half marathon, Long, Marathon Mid, 10K, Half marathon, Long, Marathon
Speed Slow, Moderate Moderate, Fast
WorkoutsDaily running, Racing Daily running, Racing
Kevin Le Gall

Kevin Le Gall

Kevin is the founder and editor of Runner's Lab. He started running in 2015 and completed his first marathon in Rotterdam in 2016. He's also worked for Under Armour from 2016 to 2018 and helped launch their running collection in Europe (in particular the HOVR shoes). In addition, Kevin is a 300-hour certified yoga teacher (Sivananda) and uses this experience to run more mindfully with a focus on well-being over performance.

Leave a Comment