Budget priced, simple, but effective! Mr Nagasawa includes these with the frames he builds for pro riders.
They fit both 110mm/8mm and 120mm/10mm track frame ends and are sold in pairs. Made in Japan, and NJS stamped and approved.
If you have an aluminium frame which has thick end plates, you need these chain tensioners, and not the NJS type. The NJS type only fit on steel frames. Learn MoreJPY¥1,890