Performance trainers often capture whats best about running. The best ones make you feel fast and free, while providing far more cushioning and support than a racing shoe ever could. Many runners find them ideal for 10-mile-pace tempo runs in training; slightly heavier or less stable runners like them for racing.
The GRID Spy is a long overdue update to Sauconys GRID Swerve, and it well deserves a performance trainer label, not just for its weight, but for its wide appeal. Its built on a broader, straighter last than the Swerve, which gives it more stability. (It also has a good medial post and midfoot shank.) The Spy feels softer and smoother than the Swerve, and you feel as though youre riding more in the shoe than on top of it, which was a limitation of its predecessor. Compare it with the £80 Asics DS Trainer
, a classic sub-300g performance trainer, and youll find the Spy is still softer, higher off the ground and slightly less responsive. Its also slightly less stable, all of which probably makes it most suited to lighter runners. One down side, which may have been limited to our samples: the upper began to unstitch after less than 100 miles.
But for stitching problems with our samples, the new GRID Spy is a fleet-footed pleasure. Its light, smooth, and well-cushioned, with an appeal thats as wide as but slightly different from that of the Asics Gel DS Trainer.
Try it if you liked
Saucony GRID Swerve (£75); Asics Gel DS Trainer (£80); Fila Flow (£60)