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Box Two Alloy Sealed Integrated 45x45 IS41 Headset Headset

Headset: Fits integrated-1-1/8. 1 verified variant.

What the checker says5check before you buy

Run variant by variant through the BMX builder’s own engine. Every sentence below is the checker’s, unedited. Nothing here says this part fits your bike; it says what it does and does not fit among the parts we hold.

Checked against 641 verified BMX parts in this catalog. 636 produced no finding of any kind.

Check before you buy

  • Check before you buywarning · FrameHeadset/head tube mismatch: Box Two Alloy Sealed Integrated 45x45 IS41 Headset is made for a integrated-1-1/8 head tube and Elite BMX Stealth has a threadless-1-1/8 head tube - headset formats are head-tube-specific (an integrated headset needs the frame's machined bearing seat; cup formats need their own bore) - check the frame maker's headset spec. On 1 of the 79 verified frames in this catalog.
  • Check before you buywarning · FrameHeadset/head tube mismatch: Box Two Alloy Sealed Integrated 45x45 IS41 Headset is made for a integrated-1-1/8 head tube and Kink Curb has a mid head tube - headset formats are head-tube-specific (an integrated headset needs the frame's machined bearing seat; cup formats need their own bore) - check the frame maker's headset spec. On 1 of the 79 verified frames in this catalog.
  • Check before you buywarning · FrameHeadset/head tube mismatch: Box Two Alloy Sealed Integrated 45x45 IS41 Headset is made for a integrated-1-1/8 head tube and Mafia Bikes Blackjack Pro Frame has a integrated-tapered-1-1/8-1.5 head tube - headset formats are head-tube-specific (an integrated headset needs the frame's machined bearing seat; cup formats need their own bore) - check the frame maker's headset spec. On 1 of the 79 verified frames in this catalog.
  • Check before you buywarning · FrameHeadset/head tube mismatch: Box Two Alloy Sealed Integrated 45x45 IS41 Headset is made for a integrated-1-1/8 head tube and Position One Spell has a threadless-1-1/8 head tube - headset formats are head-tube-specific (an integrated headset needs the frame's machined bearing seat; cup formats need their own bore) - check the frame maker's headset spec. On 1 of the 79 verified frames in this catalog.
  • Check before you buywarning · FrameHeadset/head tube mismatch: Box Two Alloy Sealed Integrated 45x45 IS41 Headset is made for a integrated-1-1/8 head tube and Verde Cadet has a threadless-1-1/8 head tube - headset formats are head-tube-specific (an integrated headset needs the frame's machined bearing seat; cup formats need their own bore) - check the frame maker's headset spec. On 1 of the 79 verified frames in this catalog.
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.

$39.99 MSRP·85 g

What the maker states1 stated
  • Fits integrated-1-1/8.

Source: the maker’s page. Last checked 2026-08-01.

Checked against

The checker ran this model against every verified part below that it has a slot for, the same way it checks a build in the builder. What follows is the verdict it actually produced for that specific pairing — not a recommendation, and not a guarantee any of these parts fits your own bike.

6 of 499 counterparts with a page of their own that the checker actually probed this model against, in alphabetical order by brand and model — never by price, popularity or the verdict itself.

Where this sits

Previous: Box Two 1 Inch Integrated HeadsetNext: Box Two Oversized 1-1/8 - 1.5 Inch Tapered HeadsetAll Box headsetsOpen a variant in the builder to see the ones that apply to your own parts