The Sole Fitness SOLE F80 Treadmill is the best rated in its class. Its high-powered motor offers speeds up to 12 mph and inclines up to 15 levels – challenging you to your best performance. The treadmill features the cushion flex whisper deck, which reduces impact up to 40% as compared to running on asphalt (your knees will thank you for it). The F80 Treadmill also offers cooling fans, a tablet holder, and even Bluetooth built-in audio speakers – because your workout should be challenging, but that doesn’t mean it can’t also be fun!