![]() The new motor isn’t as quiet as the Shengyi, but it isn’t something that lingers as you twist the throttle off the line and blast off. Zipping out of the driveway on the new RadWagon 4, I immediately forgot about the Shengyi. The larger diameter of the Shengyi motor translated to a quieter operation and boasted regeneration that helped slow the bike and recharge the battery at up to 284 watts when stopping. I have to say that when I first realized Rad Power Bikes was swapping out the 750-watt Shengyi motor in the previous RadWagon for a new motor, I was a bit bummed. One of the most exciting upgrades arriving with the new RadWagon 4 is a new 750-watt geared hub motor that boasts twice the torque off the line versus its direct drive predecessor. ![]() The lower center of gravity makes carrying weight on the bike that much easier, as it’s no longer necessary to muscle the bike around when carrying heavier loads. Either of us can ride with the kids without having to buy a different bike, change seats, or get out any tools. The result of the lower standover height, easily adjustable stem height, and telescoping seat post is a bike that can support both my wife and I. To lock the stem in place, simply push the lever back down until the button pops back out and everything is tight. The handlebars can be adjusted to the right height in a matter of seconds. ![]() A quick push of the locking button on the side of the stem followed by a quick tug up on the lever atop the stem and tension is released. Up front, Rad Power Bikes upgraded the stem on the RadWagon 4 to a quick adjust stem, making it easy to raise or lower the stem or adjust the angle of the handlebars with just the push of a button. ![]()
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