JIS D 9421:2009 PDF Download

A standard known as JIS D 9421:2009 describes in detail the rims that are used on bicycles, both for adult use and for small children. The equivalent standard, designated ISO 5775-2:1996 and its amendment 1 (2001), is acknowledged as an international standard.

Manufacturers and users of bicycle rims can guarantee that the rims satisfy the necessary requirements and are safe to use by adhering to JIS D 9421:2009. The standard offers a global set of recommendations for rim design, construction, and performance with the intention of fostering compatibility and consistency in the bicycle industry.

This standard is crucial because it enables producers to create rims that are appropriate for both everyday bicycle use and for use by small children.