Extention sprung tensioner

Sprung chain tensioner for Extention frames, as found on Vary and Alter models but will fit all Extention sprung tensioner mounts.

• CNC milled arm out of billet 7075-T6 aluminium
• CNC machined jockey wheels with machine bearings, 8T
• As found on Extention Vary and Alter bikes
• Further improved stability and tension
• Anodized in black
• Strong steel spring with adjustable preload offers more linear tension throughout arm movement