Onyx MTB Rear Hub

Average User Rating: (Spectacular)
Onyx MTB Rear Hub
Create New Tag

Compare to other Rear Hubs

Need more info? View our MTB Rear Hubs buyer's guides.

Amazingly quiet with instant engagement

Rating: Featured Member Review
The Good:

Enjoy the sounds of nature / instantly

The Bad:

Heavier than other hubs in its class

Overall Review:

This is a review for the NOBL branded Onyx hub.

I've never been a fan of super loud bee hive sounding hubs. I used to pack my old hubs with extra grease so they would stay quiet for as long as the grease lasted. When these hubs came to the mtb market I had to try them. NOBL offered them as an option for their wheelsets and I pulled the trigger.

First off these hubs are super quiet. There is virtually no noise except for the sound of the dirt crunching under your tires. It makes for a super peaceful outing in the mountains especially if you're riding solo or the trail systems are deserted. The silence allows me to focus on the trail Unfortunately, if you have anything creaky or poppy on your bike it will suddenly be amplified. 

Onyx offers instant engagement with their sprag clutch. More knowledgeable people on the internet have explained how this works so I won't go into it here. Suffice to say it's not a metal on metal feel like perhaps what other instant engagement hubs users are perhaps used to. You lurch forward with every pedal stroke but it feels more like a very, very taut slingshot if I have to describe the sensation. Still, it's a solid feeling and I love the way it rides. 

Another benefit is the super low drag of these hubs. I've spun these in the workstand (yea I know, very scientific) and the hubs take much longer than my regular hubs to stop and will often spin in the other direction. After 2 years riding in them in the PNW in mud/rain I haven't had a single issue with the bearings. They're still running strong. (knock on wood). 

If they're something that could be improved I'd say it'd be the weight. Honestly the weight is in the center of the wheel and I really can't feel it. I think Onyx has addressed the weight with their new lighter Vesper hubs, but I see no reason to upgrade as this is a non-issue for me. 

Conclusion: I love these silent sprag clutch hubs. They've spoiled me and I don't think I can ride anything else. Be prepared to sneak up on people though. You might want to purchase a timber bell as well. 


Product Onyx MTB Rear Hub
Riding Type Cross Country, Dirt Jump / Slopestyle, Downhill, Enduro / All-Mountain, Freeride / Bike Park, Trail
Hub Body Material 7075 Aluminum Alloy
Cassette Body Material Heat Treat Hardened Stainless Steel Driver, or Aluminum Driver with Replaceable Steel Pins (+$25)
Rear Axle 12mm x 148mm (Boost)
Bearing Type Hybrid Ceramic Bearings, Adjustable Preload for Bearings
Hole Count 24, 28, 32, 36 Counts Available
Disc Mount Type Centerlock, 6 Bolt
Colors 24 Shell Colors with Additional Widget and Axle Color Options

Shell Colors: Polished Aluminum, Anodized Black, Anodized Matte Black, Anodized Blue, Anodized Gold, Anodized Green, Anodized Orange, Anodized Pink, Anodized Purple, Anodized Red, Powder Coat Black Aura, Powder Coat Black Chrome, Powder Coat Blue Baby, Powder Coat Blue Candy, Powder Coat Green Antifreeze, Powder Coat Green Fluorescent, Powder Coat Green Kawasaki, Powder Coat Orange Fluorescent, Powder Coat Pink Fluorescent, Powder Coat Purple Candy, Powder Coat Red Candy, Powder Coat White Frost, Powder Coat Yellow Cardinal, Powder Coat Yellow Fluorescent

Weight 0 lb 15.7 oz (445 g)
Miscellaneous Patented Sprag Clutch Mechanism
Instant Clutch Engagement During Power Stroke and Instant Disengagement When Coasting
Silent Operation Before, During and After Clutch Engagement
Labyrinth Seal Interface Between Driver and Hub Shell
Adjustable Side Load
Grease Service Temperature Range of -58°F (-50°C) to 248°F (120°C)
Compatibility with Shimano Hyperglide Compatible Cogs

Driver Style: SRAM XD or Shimano
Attach Style: Thru-Bolt, QR, Bolt On
Titanium Bolt
Spoke Tension: 120 Max kgf
Made in the USA
5-Year Limited Warranty
  • $445
  • $470
More Info

Onyx Website

More Products