10T Folding Bike Chain Guide Tensioner, Bicycle Rear Derailleur Chain Tensioner, Aluminum Alloy Chain Tensioner with 10T Pulley for 3sixty and 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 Chain Control: This 10T folding bike chain guide tensioner keeps your chain securely aligned during rides, preventing slippage or derailment on bumpy roads or turns. Designed specifically for folding bikes like 3sixty and Brompton, it replaces the original rear derailleur as a complete unit for reliable performance.
• Lightweight Durable Build: Made from high-quality aluminum alloy and POM steel, this bicycle chain tensioner offers excellent wear resistance without adding unnecessary weight. At just 320g, it maintains your bike’s agility while ensuring long-term use across daily commutes or weekend adventures.
• Universal Folding Bike Compatibility: The bike chain tensioner fits a wide range of internal and external gear systems—including single speed, internal 3/5/8 speeds, and external 2 speeds—making it ideal for urban commuters, bike travelers, and folding bike enthusiasts who demand smooth, consistent drivetrain performance.
• Smooth Ride Experience: Engineered with a 10-tooth pulley system, this rear derailleur chain tensioner reduces chain vibration and noise, delivering a quieter, smoother ride. Its simple installation adds no extra burden to your bike, so you can focus on enjoying every pedal stroke with confidence.
• Complete Ready-to-Install Kit: Each package includes 1 x bike chain tensioner and 2 x wrenches for quick setup right out of the box. Whether you're upgrading your 3sixty or replacing a worn Brompton derailleur, this kit gets you back on the road fast with minimal tools and zero guesswork.