Onyx Aluminium HG Cog

Marsoni

M251S

$51.00

Get it in 3 business days with 1 day shipping. Friday, May 29

Onyx Aluminium HG CogQuality Aluminium replacement Cog from Onyx. Made in the USA Broached splines are made exactly the same for every cog, every time. 7075 T651 Aluminum Drivetrain Speeds: Single Speed 3 32" Weight: 10g (16t) *Shimano Fitment

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Strong magnet, looser fit than I like. Once I hang my headphones on the hanger it weighs it down enough to make the tab in the back not do it's job of keeping the base station from slipping out. I squeezed/pinched/bent the plastic together and it is working for now, but the plastic is flexible and I have a feeling I will be doing this again or needing to put some sort of support on the back. It came with a prybar, so I assumed it would be a tighter fit. Not so much.

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Reviewed in the United States on February 19, 2026

Verified Purchase

Marshall

New York, US

★★★★★ 5

Great pickup

Style: Base Station Mount + Headphone Hanger

Works perfectly. Original magnet was a little weak but I got it to worm

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Reviewed in the United States on April 4, 2026

Verified Purchase