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e*thirteen Helix Race 12-Speed 9-50T Cassette

What the checker says90will not fit23check before you buy

Run variant by variant through the mountain 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 6114 verified mountain bike parts in this catalog. 5467 produced no finding of any kind.

Will not fit

  • Will not fiterror · Rear WheelFreehub mismatch: e*thirteen Helix Race 12-Speed 9-50T needs a SRAM XD freehub, but Rear wheel has Shimano Micro Spline. On 212 of the 607 verified rear wheels in this catalog.
  • Will not fiterror · Rear WheelFreehub mismatch: e*thirteen Helix Race 12-Speed 9-50T needs a SRAM XD freehub, but Rear wheel has Shimano HG. On 136 of the 607 verified rear wheels in this catalog.
  • Will not fiterror · Rear HubFreehub mismatch: e*thirteen Helix Race 12-Speed 9-50T needs a SRAM XD freehub, but Rear wheel has Shimano Micro Spline. On 46 of the 124 verified rear hubs in this catalog.
  • Will not fiterror · Rear HubFreehub mismatch: e*thirteen Helix Race 12-Speed 9-50T needs a SRAM XD freehub, but Rear wheel has Shimano HG. On 37 of the 124 verified rear hubs in this catalog.
  • Will not fiterror · Rear DerailleurDrivetrain mismatch: Derailleur = Shimano LinkGlide (CUES), Cassette = SRAM Eagle 12-speed. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 21 of the 75 verified rear derailleurs in this catalog.
  • Will not fiterror · Rear DerailleurDrivetrain mismatch: Derailleur = Shimano 12-speed, Cassette = SRAM Eagle 12-speed. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 19 of the 75 verified rear derailleurs in this catalog.
  • Will not fiterror · Rear WheelFreehub: e*thirteen Helix Race 12-Speed 9-50T is a SRAM XD cassette and Rear wheel has the road-length SRAM XDR driver, which is 1.85mm longer. SRAM documents fitting a 1.85mm spacer behind the cassette to bridge that gap; this comparison does not check whether this driver already carries one. A shim or adapter may make other sizes or standards work, but that is a modification, not a fit. On 19 of the 607 verified rear wheels in this catalog.
  • Will not fiterror · ShifterDrivetrain mismatch: Shifter = Shimano 12-speed, Cassette = SRAM Eagle 12-speed. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 19 of the 53 verified shifters in this catalog.

Cassette capacity, Rear Derailleur. 27 more findings from the same check, on up to 1 of the 75 verified rear derailleurs each.

Drivetrain system, Chain. 15 more findings from the same check, on up to 9 of the 45 verified chains each.

Drivetrain system, Rear Derailleur. 11 more findings from the same check, on up to 7 of the 75 verified rear derailleurs each.

Drivetrain system, Shifter. 11 more findings from the same check, on up to 11 of the 53 verified shifters each.

Drivetrain speeds, Rear Derailleur. 5 more findings from the same check, on up to 16 of the 75 verified rear derailleurs each.

Drivetrain speeds, Shifter. 5 more findings from the same check, on up to 10 of the 53 verified shifters each.

Drivetrain system, Front Derailleur. 4 more findings from the same check, on up to 12 of the 34 verified front derailleurs each.

Freehub, Rear Hub. 1 more finding from the same check, on up to 2 of the 124 verified rear hubs each.

Freehub, Rear Wheel. 1 more finding from the same check, on up to 1 of the 607 verified rear wheels each.

Gearbox cassette, Gearbox. 1 more finding from the same check, on up to 6 of the 6 verified gearboxs each.

Open a variant in the builder to see the ones that apply to your own parts.

Check before you buy

    Front derailleur speeds, Front Derailleur. 23 more findings from the same check, on up to 1 of the 34 verified front derailleurs each.

    Open a variant in the builder to see the ones that apply to your own parts.

    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.

    $329.95 MSRP·384 g

    What the maker states

    Speeds
    12-speed (rear index count the maker rates it for)
    System
    Drivetrain system SRAM Eagle 12-speed
    Freehub
    / driver SRAM XD
    Minimum cog
    Smallest cog 9 teeth
    Maximum cog
    Largest cog 50 teeth
    Source

    Source: the maker’s page. Last checked 2026-07-16.

    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 1875 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 e*thirteen cassettesOpen a variant in the builder to see the ones that apply to your own parts