DJ Single Speed MTB Folding Bike Chain Tensioner Adjustable Pulley + Derailleur Jockey WheelSingle Speed Chain Tensioner Conversion Converts any multi speed bike to a single speed Spring loaded design accommodates a wide range of cog sizes Extremely lightweight Adjusts for perfect chain tension Adjustable chain line Take note : Mounting bolt is not provided Weight: About 59g Package Includes : 1 X New DJ Single Speed MTB Chain Tensioner Adjustable Pulley + Derailleur Jockey Wheel

Q-Faktor: 168mm

CNC machined 7075-T6 aluminium provides the perfect blend of light weight and strength

Steel braking surface and aluminum center piece for toughness

That means that the braking performance meets the requirement of EU standard and the friction material is environment friendly

CNC Alloy DU + Sealed bearings

the chain remains taut and does not hit against the strut

Chain ring bolt spacer may required if it's slightly longer - Available on our website

combined with the latest technology to create the highest standard in Schwalbe tyre creation and const ruction

Internal Diameter：30mm or 39

riding all-mountain

Drivetrain Speed: 12-Speed

The 8 large big bore air vents increase ventilation to keep you cool