Yukon Step-ThruIts got all the power and grit of the Yukon 750, our Best Seller, but with a frame thats comfy to step onto making it easier to get up and away on your trusty electric bicycle. The Yukon Step Thru features our 500w (750w peak) rear hub motor, matched with 4 wide Fat Tires which roll confidently over all sorts of challenging terrain. Regardless of the season, the Yukon is ready to face the challenge.