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Prototype - Evolving Daily

Acros ZS44/28.6 | EC44/40 Headset Headset

What the checker says5will not fit

Run variant by variant through the gravel bike 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 831 verified gravel bike parts in this catalog. 826 produced no finding of any kind.

Will not fit

  • Will not fiterror · ForkHeadset steerer mismatch: Acros ZS44/28.6 | EC44/40 Headset accepts a tapered-1-1-8-1-1-2 steerer but Cervelo Aspero-5 Disc Fork is cervelo-d-shaped. On 1 of the 30 verified forks in this catalog.
  • Will not fiterror · ForkHeadset steerer mismatch: Acros ZS44/28.6 | EC44/40 Headset accepts a tapered-1-1-8-1-1-2 steerer but Ritchey WCS Carbon Adventure Gravel Fork is straight-1-1-8. On 1 of the 30 verified forks in this catalog.
  • Will not fiterror · ForkHeadset steerer mismatch: Acros ZS44/28.6 | EC44/40 Headset accepts a tapered-1-1-8-1-1-2 steerer but Ritchey WCS Carbon Gravel Cross Fork is straight-1-1-8. On 1 of the 30 verified forks in this catalog.
  • Will not fiterror · ForkHeadset steerer mismatch: Acros ZS44/28.6 | EC44/40 Headset accepts a tapered-1-1-8-1-1-2 steerer but Ritchey WCS Carbon Tapered All-Road Cross Fork is tapered-1-1-8-1-1-4. On 1 of the 30 verified forks in this catalog.
  • Will not fiterror · ForkHeadset steerer mismatch: Acros ZS44/28.6 | EC44/40 Headset accepts a tapered-1-1-8-1-1-2 steerer but Whisky Parts Co. No.9 CX Disc 12 Straight is straight-1-1-8. On 1 of the 30 verified forks 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.

$124.26 MSRP·105 g

What the maker states

Upper
Assembly ZS44/28.6 (S.H.I.S.)
Lower
Assembly EC44/40 (S.H.I.S.)
Steerer
Tapered 1.125-1.5
Source

Source: the maker’s page. Last checked 2026-08-05.

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 488 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

All Acros headsetsOpen a variant in the builder to see the ones that apply to your own parts