Endorphin Speed
The original Endorphin Speed is a lightweight road shoe for speed training and race day. Flexible PWRRUN PB works with SPEEDROLL and a semi-rigid nylon plate to deliver propulsion with a more forgiving feel than the carbon-plated Pro. At 221g with an 8mm drop and 35.5/27.5mm stack, it suits tempo sessions, longer fast runs and racing. ABC-MART's Japan release launched it on August 1, 2020.
- Intended uses:
- Race
Specs
- Weight
- 221g
- Of 948 known values: 146 lower, 3 equal, 799 higher. The marker uses the midpoint of equal values.
- lighterLower 15.7%, including ties / average -47g
- Drop
- 8mm
- Of 961 known values: 479 lower, 272 equal, 210 higher. The marker uses the midpoint of equal values.
- Standard64th percentile (tie midpoint) / average +1.2mm
- Stack (heel/forefoot)
- 35.5 / 27.5mm
- Of 788 known values: 419 lower, 15 equal, 354 higher. The marker uses the midpoint of equal values.
- Standard54.1th percentile (tie midpoint) / average +1.2mm
- Carbon plate
- No
- 83% of 866 known models have no carbon plates
- Midsole
- PWRRUN PB
- Outsole
- -
- Not registered
- Reference price
- $160
- US price
Weight measurement and plate details
- Weight note
- ABC-MART's exact authorized S20597-10 product page lists men's approximate weight as 221g. An exact i-Run S20597-40 page reports a retailer-observed 212g EU42 sample, which is retained as a sample/method difference rather than replacing 221g.
- Plate note
- The exact SHOES MASTER Endorphin Collection article identifies the original Endorphin Speed as a speed-training model with a semi-rigid nylon plate. It is not a carbon plate.
Prices and release dates by market
2 markets are registered. Values are shown as published for each market: no currency conversion and no guessed days or months. Reference prices are not current shop prices.
| Market | Reference price | Release |
|---|---|---|
| United StatesUS | $160Shown above | Not registered |
| JapanJP | ¥17,600 | 2020-08-01Shown above |
Compare within the database
See where these specs sit in the overall distribution. You can also compare within the same category.
Position map
Weight x stack height
registered average: 266g / 34.4mm (768 shoes)
The scatter plot includes only shoes with both weight and stack height registered.
Spec distributions
Weight
This shoe 221gregistered average 268g (948 shoes)
Drop
This shoe 8mmregistered average 6.8mm (961 shoes)
Stack height
This shoe 35.5mmregistered average 34.3mm (788 shoes)
Items with missing numeric values are excluded. Sample sizes and measurement conditions vary between models; this distribution is not a performance ranking.