chain tensioner for single speed conversions is a must-have for folding bikes enthusiasts. Made from aluminum alloy, it features an elliptical plate for smooth chain operation. This accessory ensures your chain remains secure, providing a reliable and efficient solution for maintaining optimal chain tension during your rides. Features -Color:Red -Material:Aluminum alloy, stainless steel -Size: 11.00X2.50X2.20cm/4.32X0.98X0.86in -Travel convenience: lightweight and portable, It's for travel and urban commuting -Enhanced chain stability: improves the stability and efficiency of system, reducing chain drop risks -Safety enhancement: keeps the chain securely in place, ensuring a safer ride - construction: built with Aluminum alloy, stainless steel aluminum alloy and stainless steel for durability -Singlespeed maintenance: ideal for chain replacement and maintenance on singlespeed bicycles Package list: 1 x Bicycle Chain Tensioner