Saucony Endorphin Speed 3 vs. 4 | Which to Choose?
Today David compares the Endorphin Speed 4 and Speed 3.
Shop the Endorphin Speed 4 at Running Warehouse (affiliate): https://www.runningwarehouse.com/catp...
Make sure you also catch our 100 mile review of the Speed 4
• Saucony Endorphin Speed 4 after 100 Miles