Campagnolo Ekar Cassette

Name: Campagnolo Ekar Cassette
Brand: Campagnolo

What the checker says250will not fit7check before you buy

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 863 verified gravel bike parts in this catalog. 737 produced no finding of any kind. Each variant produces 108 to 112 distinct errors and 7 distinct warnings.

Will not fit

Will not fiterror · Rear DerailleurSpeed mismatch: Rear derailleur 12s, Cassette 13s. The drivetrain must share one speed count. On 8 of the 20 verified rear derailleurs in this catalog. Applies to all 3 variants.
Will not fiterror · Rear DerailleurDrivetrain mismatch: Rear derailleur = shimano-grx-12, Cassette = campag-ekar-13. Shifter, derailleurs and cassette must be one system. On 5 of the 20 verified rear derailleurs in this catalog. Applies to all 3 variants.
Will not fiterror · Shifter/Brake LeversSpeed mismatch: Shifter 12s, Cassette 13s. The drivetrain must share one speed count. On 5 of the 17 verified shifter/brake levers in this catalog. Applies to all 3 variants.
Will not fiterror · Front DerailleurDrivetrain mismatch: Front derailleur = sram-axs-road, Cassette = campag-ekar-13. Shifter, derailleurs and cassette must be one system. On 4 of the 11 verified front derailleurs in this catalog. Applies to all 3 variants.
Will not fiterror · Rear DerailleurSpeed mismatch: Rear derailleur 11s, Cassette 13s. The drivetrain must share one speed count. On 4 of the 20 verified rear derailleurs in this catalog. Applies to all 3 variants.
Will not fiterror · Rear DerailleurDrivetrain mismatch: Rear derailleur = shimano-grx-11, Cassette = campag-ekar-13. Shifter, derailleurs and cassette must be one system. On 4 of the 20 verified rear derailleurs in this catalog. Applies to all 3 variants.
Will not fiterror · Shifter/Brake LeversDrivetrain mismatch: Shifter = shimano-grx-12, Cassette = campag-ekar-13. Shifter, derailleurs and cassette must be one system. On 4 of the 17 verified shifter/brake levers in this catalog. Applies to all 3 variants.

Rg freehub, Rear Wheel. 195 more findings from the same check, on up to 2 of the 71 verified rear wheels each.

Rg chain std, Chain. 15 more findings from the same check, on up to 1 of the 17 verified chains each.

Rg rd capacity, Rear Derailleur. 15 more findings from the same check, on up to 1 of the 20 verified rear derailleurs each.

Rg drivetrain system, Shifter/Brake Levers. 6 more findings from the same check, on up to 3 of the 17 verified shifter/brake levers each.

Rg drivetrain system, Rear Derailleur. 5 more findings from the same check, on up to 3 of the 20 verified rear derailleurs each.

Rg drivetrain system, Front Derailleur. 4 more findings from the same check, on up to 3 of the 11 verified front derailleurs each.

Rg drivetrain speeds, Shifter/Brake Levers. 2 more findings from the same check, on up to 3 of the 17 verified shifter/brake levers each.

Rg drivetrain speeds, Rear Derailleur. 1 more finding from the same check, on up to 3 of the 20 verified rear derailleurs each.

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

Check before you buy

Check before you buywarning · Front DerailleurFront derailleur Shimano GRX FD-RX400-F is rated for 10-speed rear drivetrains (the maker's own spec); this build's cassette is 13-speed. Check the maker's compatibility chart. On 1 of the 11 verified front derailleurs in this catalog. Applies to all 3 variants.
Check before you buywarning · Front DerailleurFront derailleur Shimano GRX FD-RX810-F (RX600-tier) is rated for 11-speed rear drivetrains (the maker's own spec); this build's cassette is 13-speed. Check the maker's compatibility chart. On 1 of the 11 verified front derailleurs in this catalog. Applies to all 3 variants.
Check before you buywarning · Front DerailleurFront derailleur Shimano GRX FD-RX810-F is rated for 11-speed rear drivetrains (the maker's own spec); this build's cassette is 13-speed. Check the maker's compatibility chart. On 1 of the 11 verified front derailleurs in this catalog. Applies to all 3 variants.
Check before you buywarning · Front DerailleurFront derailleur Shimano GRX FD-RX815-F is rated for 11-speed rear drivetrains (the maker's own spec); this build's cassette is 13-speed. Check the maker's compatibility chart. On 1 of the 11 verified front derailleurs in this catalog. Applies to all 3 variants.
Check before you buywarning · Front DerailleurFront derailleur Shimano GRX FD-RX820 is rated for 12-speed rear drivetrains (the maker's own spec); this build's cassette is 13-speed. Check the maker's compatibility chart. On 1 of the 11 verified front derailleurs in this catalog. Applies to all 3 variants.
Check before you buywarning · Front DerailleurFront derailleur Shimano GRX FD-RX825 is rated for 12-speed rear drivetrains (the maker's own spec); this build's cassette is 13-speed. Check the maker's compatibility chart. On 1 of the 11 verified front derailleurs in this catalog. Applies to all 3 variants.
Check before you buywarning · Front DerailleurFront derailleur microSHIFT Sword FD-G7020-F is rated for 10-speed rear drivetrains (the maker's own spec); this build's cassette is 13-speed. Check the maker's compatibility chart. On 1 of the 11 verified front derailleurs in this catalog. Applies to all 3 variants.

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.

$320.00 to $360.00 MSRP·340 to 415 g

What the maker states

Speeds: 13-speed (rear index count the maker rates it for)
System: Drivetrain system campag-ekar-13
Freehub: / driver n3w
Minimum cog: Smallest cog 9 teeth (on 2 of 3 variants); Smallest cog 10 teeth (on 1 of 3 variants)
Maximum cog: Largest cog 36 teeth (on 1 of 3 variants); Largest cog 42 teeth (on 1 of 3 variants); Largest cog 44 teeth (on 1 of 3 variants)

A value shown as a set or a range differs between this model’s variants and is never one variant’s spec.

3 verified variants

Variant	Minimum cog	Maximum cog	Price (MSRP)	Weight	Source	Last checked	Build
Ekar 9-36	Smallest cog 9 teeth	Largest cog 36 teeth	$320.00	340 g	maker’s page	2026-07-20	Build with this
Ekar 9-42	Smallest cog 9 teeth	Largest cog 42 teeth	$340.00	390 g	maker’s page	2026-07-20	Build with this
Ekar 10-44	Smallest cog 10 teeth	Largest cog 44 teeth	$360.00	415 g	maker’s page	2026-07-20	Build with this

Source

Source: each variant links the maker’s own page in the table above. Last checked 2026-07-20.

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.

3T Exploro Race (Frame) No conflicts found
3T Fango LTD (Fork) No conflicts found
8bar Gravel Carbon Disc Fork v2 (Fork) No conflicts found
9point8 Fall Line R (Dropper Post) No conflicts found
Acros ZS44/28.6 | EC44/40 Headset (Headset) No conflicts found
All-City Cosmic Stallion LTD (Frame) No conflicts found

6 of 508 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 Campagnolo cassettesOpen a variant in the builder to see the ones that apply to your own parts