What’s the difference between the Saucony Endorphin Pro 4 and Speed 4 we hear you ask? 🧐 Here’s one way to look at it, plate rigidity… 👉 Pro 4 = stiff full-length carbon plate This design allows the shoe to maximise the force you put into it, propelling you forward through every foot strike ⚡️ making the Pro 4 perfect for an all-out race day effort but will feel unstable for any other type of running 🏃‍♂️🏃‍♀️ 👉 Speed 4 = winged nylon plate The extra flex in this type of plate allows you to