Size: 32mm (Regular valve). Fits all 20" x 4.0" tire tube, compatible with 20x4.0/4.5 road bike/mountain bike tire tube.
High Quality: The 20x4 bike tube is made from premium butyl rubber.It has the advantages of good sealing performance, ozone resistance, aging resistance, shock absorption, electrical insulation.
Easy Installation: Installation is quick and easy. Please follow inflation guide when airing a tire from a complete flat. Save time and effort, replace the old tube in a few minutes
Universal fit for Mountain, Road, BMX, Electric, and City bikes: Designed specifically for 20-inch wheels, this tube is the perfect spare or upgrade for junior mountain bikes (MTB), e bikes, BMX freestyle, city commuters, and folding bikes. Whether tackling rugged trails or smooth roads, it delivers reliable performance across all riding styles.
Important Note: When changing a bicycle inner tube, be sure to add a little air before installing it. This gives it form so it doesn't get twisted or bunch up which may cause a pinch flat. Inspect for an even bead of the tire to the rim on both sides.
Comfortable and Safe: After replacing the butyl rubber tube, it absorbs the impact on the uneven road surface, making riding more comfortable and safe.
Installation Precautions: Please check the side of your tire for the tire size your bike uses.
