10T Folding Bike Chain Guide Tensioner, Bicycle Rear Derailleur Chain Tensioner, Aluminum Alloy Chain Tensioner for 3sixty and Brompton Folding Bikes with 10T Pulley

Item Type: Bike Chain TensionerMaterial: Aluminum alloy+POMNumber of Teeth: 10TFitment: Fit for 3sixty and other internal variable speed folding bike (single speed, internal 3 speeds, external 2 speeds, internal 5 speeds and internal 8 speeds)Application: For Brompton special rear derailleur can replace for Brompton original rear derailleur as a whole, and help the chain to prevent the chain from falling off more effectivelyWeight: Approx. 320g / 11.3ozPackage List：1 x Bike Chain Tensioner2 x Wrench

• Precision 10T Pulley Design: This bike chain tensioner features a precisely engineered 10T rear pulley that maintains optimal chain alignment and tension, significantly reducing the risk of chain drop during rides—especially critical on compact folding bikes like 3sixty and Brompton where space and stability are limited.
• Direct Replacement for Brompton Systems: Designed as a full replacement for the original Brompton special rear derailleur, this bicycle chain tensioner integrates seamlessly with your existing drivetrain, offering enhanced reliability without requiring complex modifications or additional parts.
• Universal Compatibility Across Speeds: The folding bike chain guide tensioner works flawlessly with single-speed, internal 3/5/8-speed, and external 2-speed folding bicycles, making it ideal for urban commuters, touring cyclists, and daily riders who demand consistent performance across varied gear setups.
• Lightweight Durable Construction: Built from high-quality aluminum alloy and POM composite materials, this rear derailleur chain tensioner delivers exceptional wear resistance and corrosion protection while keeping weight low at just 320g—ensuring long-term use without adding bulk to your bike.
• Easy Installation with Included Tools: This bike chain tensioner comes with two wrenches for quick, tool-assisted setup, allowing you to mount it in minutes without professional help; its streamlined design adds no extra drag or burden, so your ride stays smooth and efficient right out of the box.