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Take the Guess work out of your NJS Build

Here at Track Supermarket, we often get questions about parts compatibility, size of this component and length of that component. We are aiming to simplify the build process by providing you with a “Can’t-go-wrong” package for your NJS frame. All of the parts except the saddle (due to comfort) are NJS approved items and compatible…

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All NJS Light Weight build

Just how light, or heavy, is an all-NJS keirin track bike build? We had often wondered this, and finally had a chance to find out. As you may know there are no carbon parts in Japanese keirin racing, and titanium is hardly used, either, so this is a proper old-school track bike, although everything you…

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Dating Japanese track bike frames – serial numbers.

Below are a couple of photos of the underbellies of Japanese NJS track frames. The bottom bracket shell usually has some numbers roughly stamped in which give the builder (and us) a reference of what the frame is. Builders have their own unique ways of numbering frames and usually keep records of all of the…