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Shimano: what it makes and how it fits
Shimano is one of the drivetrain makers whose bottom brackets, Hollowtech II cranks and complete drivetrains appear across the bikes this site covers.
About Shimano
Shimano, Inc., originally Shimano Iron Works (島野鐵工所) and later Shimano Industries, Inc. (島野工業株式会社), is a Japanese multinational manufacturing company for cycling components, fishing tackle and rowing equipment, which also produced golf supplies until 2005 and snowboarding gear until 2008. Named after founder Shozaburo Shimano and headquartered in Sakai, Osaka Prefecture, the company has 49 consolidated subsidiaries, with the primary manufacturing plants based in Kunshan (China), Malaysia, and Singapore.
Shimano is based in Sakai, Japan; founded in 1921; founded by Shozaburo Shimano.
What this means for fitment
For choosing parts, what matters is the interface Shimano uses, not the brand name. Match the crank spindle to your frame's bottom bracket shell, and the headset or seatpost to the frame's own standard, then pick the Shimano part that fits that standard.
The fitment tool starts from your frame's shell or crank spindle and returns the exact bottom bracket to buy, whether the part drops in, needs a specific bearing or needs an adapter.
Common fitment questions
The usual question with Shimano parts is whether a crank will fit a given shell. A crank fits a shell only through a bottom bracket built for both, so identify the shell standard first, then choose the Shimano compatible bottom bracket for it.
Where a crank spindle and a shell are not a native pair, a reducer or conversion bottom bracket may bridge them, which the fitment tool flags on the relevant pages.
The second question is whether the shell width matters. It does: a road shell and a mountain shell of the same standard take different bottom bracket widths, so a Shimano bottom bracket is chosen by both the shell standard and its width. Measure the shell face to face before ordering, and confirm the crank spindle diameter stamped on the axle or listed in the part number.
None of this changes the crank itself. The crank stays the same part across every compatible frame, and only the bottom bracket that carries it into the shell changes with the frame's standard.
| Fact | Value |
|---|---|
| Country | Japan |
| Headquarters | Sakai |
| Founded | 1921 |
Structured facts from Wikidata (CC0).
Fitting a Shimano crank or bottom bracket?
Open the BB compatibility toolPick your shell and crank spindle to see the exact bottom bracket you need.Find Shimano bottom bracket on eBayaffiliateRelated
Sources: Shimano (Wikipedia, CC BY-SA) · Park Tool: Bottom Bracket Standards