Made in Japan - cast steel with tough plating.

These chain tensioners are designed to keep your rear wheel from slipping forward under load, 

and also make it easy to set your chain tension.

Designed for steel track frames, with horizontal track ends, 5mm thick or less, and 10mm rear wheel axle

diameter.

NJS approved for racing in Japan. Top quality.

Shipping from Tokyo, with Fedex express shipping.