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2025 sprung chain tensioner for Extention frames, as found on the Edith, Jarvis and Avenger.
- CNC milled arm out of billet 7075-T6 aluminium
- CNC machined jockey wheels with machine bearings, 8T/8T or 8T/10T as pictured
- Designed for use on Extention Edith, Jarvis and Avenger bikes
- Anodized in black
- Strong steel spring with adjustable preload
Please note that the latest chain tensioners feature two 8T sprockets.
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