Motion Pro Sprocket Jammer Bar Mount Kit produced with Polisport's exclusive technologies

produced with Polisport's exclusive technologies to be even more durable

Longer body design helps to reduce noise output

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- Asymmetrical medial and lateral double pivot system for improved levels of flexibility and precision for both independent and synchronized movement

Motion Pro Sprocket Jammer Bar Mount Kit produced with Polisport's exclusive technologiesPrevents rotation of chain and sprockets for easy removal or installation of counter shaft nut Can be used to pull rear wheel against chain blocks when tightening rear axle CNC billet aluminium construction Blue anodize and laser etching for easy identification Made in the USA