When it comes to e-bikes, rolling resistance is inversely proportional to range. The more resistance, the less range. The quickest way to decrease rolling resistance is to increase tire pressure. This is why road bike tires typically run over 100 psi. Most 20x4 fat tires max out at 30 psi, some go as high as 35, but these go all the way to 40, which is awesome!The tread pattern is perfect, offering MUCH better road traction than plain-old knobby tires (talking night and day, here), while at the same time not giving up very much in terms of trail performance at all. These are what I consider great "50/50" tires, in that they are perfect for both trail and street use equally.If you're still running the stock knobby tires, these will be a welcome upgrade. They aren't light, but you can run them pretty hard, so range is quite good. If you've ever installed a bike tire before, it's a piece of cake, you don't even need the included tire levers...I've never needed anything but my bare hands to change a bike tire...but they're there if you need them, which is nice. In all, these are a super upgrade from stock, and at around $100 for the pair, this is one of the best bang-for-the-buck upgrades you can do on your bike. Works great on my Tesway e-bike, and I highly recommend them. 5 stars!