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This is a replacement XRAY Belt Tensioner Set, and is intended for use with the XRAY T2 007, T2 008, T2 009, and T2R Pro. This smart, easy-to-use XRAY Belt Tensioner Set is used to control the center drive belt tension and prevent twisting. High-quality components include CNC-machined lightweight aluminum mounting post, high-speed ball-bearings, and mounting hardware.
Average design quality and fitment. If you set the tensioner mid height or higher it won't even make contact with the belt. Using on a newly built '19 Xray T4. I was told you can use front mounts, which I have not tried yet, but if you follow the manual and the center mount you'll probably wonder why they just didn't shorten the tensioner height by half.