Onyx OHM Disc BMX Rear Hub

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Onyx BMX hubs feature a patented sprag clutch gearbox that allows drag-free performance when coasting, and instantaneous engagement under power. The OHM offers a budget friendly option for entry level riders.  

Due to the minimal sprag use this hub is limited to riders weighing 120lb or less.

Not sure which Onyx BMX hub to choose?  Compare Onyx Racing BMX hubs.

Technical information:

  • Hole Counts: 28
  • Weight: 334g, Race Spec 303g (Ceramic bearing upgrade)
  • Brake Compatibility: Centerlock disc brake rotors
  • Bearings: Steel with ceramic optional upon request.
  • Gearbox: Infinite engagement sprag clutch system with 29 half-width sprags
  • Axle: 10mm bolt-on only. Axle end play not adjustable on this model
  • Cog compatibility: Shimano Hyperglide®
  • Colors: Black Only
  • Wheel building dimensions:
    • Drive side flange diameter: 47mm
    • Non-drive side flange diameter: 42mm
    • Drive side center to flange: 27.9mm
    • Non-drive side center to flange: 21.6mm
Inventory Note: ALL Onyx OHM BMX hubs are special order, and typically ship within 5-10 business days.  Please call or e-mail customer service for exact shipping times for your hub preference.

Onyx Limited Warranty:

  • This product is guaranteed against manufacturing defects for five (5) years from the original date of purchase. This covers all components that are manufactured by Onyx Racing Products.
  • This products’ Sprag is guaranteed against manufacturing defects for a period of one (1) year. The bearings are guaranteed against manufacturing defects for a period of one (1) month from the original date of purchase. These are all the components which are NOT manufactured by Onyx Racing Products.
  • Warranty does not cover damage or failure resulting from misuse, abuse, alteration, neglect, normal and reasonable wear and tear, crash or impact, failure to perform routine maintenance as instructed, improper installation, or use other than that for which the product was intended.




DT Swiss utilized its patented star ratchet system that is well known to guarantee high load capacity and reliability. The star ratchet system can be easily upgraded from 18 points of engagement to 36 or 54 points of engagement. This hub uses a center lock rotor mounting design or can be converted to ISO 6 bolt using the DT Swiss Center Lock IS (6-bolt) Adapter

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