Upgrade your bike's valve stems with this pair of tubeless Presta valve stems designed for both mountain and road bikes. Crafted from durable copper, these 45mm (1.77 inches) valve stems are built to withstand the rigors of cycling. The tubeless design eliminates the need for inner tubes, reducing weight and minimizing the risk of flats, specially for our improved, rectangular design, made for perfect sealing, which does not allow any air leakage. Whether you're tackling rugged trails or speeding down smooth roads, these valve stems provide a secure and reliable connection between your tires and wheels. With their universal compatibility, they're an essential accessory for any cyclist looking to enhance their bike's performance and reliability. Keep a spare pair on hand for quick and easy replacements when needed.