This high-quality 20x4 rim is perfect for any Ebike enthusiast. Made from a durable blend of double-layer aluminum, this rim is built to last. The double-layer design not only adds a sleek look to your bike but also improves its performance. This rim comes with a rim liner and is compatible with a variety of e-bike types, including universal, folding, electric, and fat bikes. black color and tubular tire type add to its versatility. Upgrade your bike with this rim and experience a smoother, more efficient ride.