Understanding Shimano Part Number Changes and Spare Parts Availability

When searching for spare parts for older Shimano fishing reels, you may notice that the part numbers shown in historical schematics do not always match the references currently used by Shimano.

This evolution can make finding the correct replacement part more challenging, especially for older reel generations.

This page is designed to help you understand these changes and identify possible solutions.

Shimano Part Number Evolution

Older Shimano reels typically used manufacturer part numbers beginning with:

• RDxxxx
• TTxxxx
• TGTxxxx
• BNTxxxx
• and similar formats.

Over the years, Shimano gradually standardized its internal numbering system, introducing newer formats such as:

• 10xxx
• 13xxx
• 14xxx

This modernization helps streamline inventory management across different reel generations and product families while eliminating duplicate references.

Why Do Some Older Part Numbers Change?

When an older component remains compatible with newer reel generations, Shimano may assign it a new standardized part number.

In many cases, this is simply an administrative renumbering. Occasionally, it may reflect a minor manufacturing update without affecting the part's function or compatibility.

As a result, an older reference may have a direct equivalent under a newer Shimano part number.

Not All Older Part Numbers Have Equivalents

This is an important point to understand.

Many parts from older Shimano reel generations were never migrated to the newer numbering system. In these cases, no official modern equivalent exists.

The component can only be identified by its original historical reference.

Manufacturer Obsolescence

Over time, Shimano gradually discontinues certain spare parts from its supply network.

When this happens, a part becomes manufacturer obsolete, meaning it is no longer produced or available through official Shimano distribution channels.

This naturally affects older reel generations more frequently.

Whenever this information is available, we progressively update our database to provide the most accurate availability status possible.

Our catalog is continuously improved through ongoing research and manufacturer updates.

Why Are Some Older Parts Still Available?

Shimano sometimes keeps certain parts in production long after a reel model has been discontinued.

This often applies to components shared across multiple reel models or generations.

As a result, an older part number is not necessarily unavailable simply because the reel itself is old.

Special Case: Older Shimano Bearings

Bearings deserve special attention.

Many older Shimano bearing references do not have direct equivalents within the modern Shimano numbering system.

However, bearings are fundamentally defined by their mechanical dimensions:

• Inside diameter (ID)
• Outside diameter (OD)
• Width

In many situations, these dimensions allow us to identify compatible replacements or newer equivalents used in later reel generations.

This approach often makes it possible to replace bearings that are no longer available under their original Shimano reference.

It is one of the reasons why older spare parts searches can still be successful, even when the original manufacturer reference is no longer active.

A Continuously Growing Catalog

Cataloging older Shimano reel generations is an ongoing process.

New cross-references, compatibility information, and obsolescence data are regularly added to our database.

If your older reel is not yet listed, or if a part appears difficult to find, it does not necessarily mean that no solution exists.

Need Help Finding an Older Shimano Part?

If you are looking for a spare part for an older Shimano reel, please provide:

• The exact reel model.
• The reel generation, if known.
• The Shimano part number you are searching for.
• The relevant exploded schematic, if available.

We will do our best to check for direct replacements, updated references, compatibility options, and current availability whenever possible.

Used Parts May Sometimes Provide a Solution

When an original Shimano part has become permanently obsolete or unavailable through official supply channels, a solution may still be possible through our inventory of used and salvaged components.

Availability naturally depends on current stock and incoming parts.

If you are searching for a hard-to-find component for an older Shimano reel, please don't hesitate to contact us.

In many cases, a solution may still exist, even when no official Shimano stock remains available.