BuildMyMTB
Prototype - Evolving Daily

Box Bottom Bracket

2 models, 2 verified variants. Only rows checked against Box’s own page are listed.

A value shown as a set or a range differs between this model’s variants and is never one variant’s spec. A cell marked not stated is a field the maker does not publish, so nothing here checks it.

ModelVariantsShellSpindle diameterPrice (MSRP)
Box Two 24mm Bottom Bracket1Fits a euro bottom-bracket shellSpindle 24 mm spindle$64.99
Box Two Oversized Bottom Bracket M301Fits a euro bottom-bracket shellSpindle m30$64.99

Source for every row: Box’s own product pages, last checked between 2026-07-31 and 2026-08-05.

The checker compares the dimensions listed in what we check, and what we don’t. “No conflicts found” means no conflict among those dimensions — not a guarantee that a build works. Errors mean it won’t fit; warnings mean it works but check; infos are notes.

Check a whole BMX build in the builder