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

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 folding bike chain guide tensioner features a precisely engineered 10T pulley that maintains optimal chain alignment and tension, significantly reducing the risk of chain drop during rides—ideal for urban commuters and folding bike enthusiasts who demand reliability.
• Direct Replacement for Brompton Systems: Specifically designed as a full replacement for Brompton original rear derailleurs, this bicycle chain tensioner seamlessly integrates with Brompton special rear derailleur setups, offering enhanced stability without requiring complex modifications or additional parts.
• Universal Compatibility Across Speeds: The bike chain tensioner fits 3sixty and other internal gear folding bikes, supporting single speed, internal 3/5/8 speeds, and external 2-speed configurations—making it a versatile solution for a wide range of folding, road, mountain, and fixed-gear bicycles.
• Lightweight Yet Durable Construction: Crafted from high-quality aluminum alloy and POM steel materials, this rear derailleur chain tensioner delivers excellent wear resistance and corrosion protection while keeping weight low at just 320g, ensuring long-lasting performance without burdening your ride.
• Easy Installation with Essential Tools Included: Designed for hassle-free setup, this folding bike chain guide tensioner comes with two wrenches in the package so you can install it quickly at home—no professional help needed—getting you back on the road faster with secure chain tension.