Silver Bike Chain Tensioner With Derailleur Hanger Chain Guide For Folding Bikes, Single Speed, 10mm Rear Axle, 4.5mm-5mm Installation Width, Aluminum Alloy Floating Pulley With Spring Design, Replacement Cycling Tool

Sturdy Silver Aluminum Chain Tensioner for Folding Bikes
✔️ Aluminum tensioner with floating pulley, fits 10mm axle and 4.5-5mm

This is a lightweight aluminum chain tensioner with a floating pulley and spring design geared for single-speed folding bikes. It helps keep the chain taut and prevents derailments on compact folding frames.

✅ Fitment: 10mm rear axle, 4.5-5mm installation width
✅ Material: high-quality aluminum alloy for durability and light weight
✅ Application: floating pulley and spring design to prevent chain slip
✅ Includes: 1x bike tensioner
✅ Suitable for folding bikes like DAHON BYA412

💡 What is a chain tensioner used for on a folding bike with a single-speed setup?

Here's a handy, general explanation to help shoppers understand its role.

- It helps keep chain tension consistent on compact folding frames. - It reduces chain derailment by maintaining proper chainline with the chainring. - It supports converting multiple-speed rigs to single-speed by stabilizing chain tension. - It's a handy accessory for folding bikes with 10mm rear axles and 4.5-5mm installation width.