Are you looking for an in-depth review of the Onyx Ultra ISO rear cassette HG hub?
I bet you’ve been hunting for that edge off the gate.
It’s your LUCKY day!
The Ultra ISO cassette hub answers your call.
Its oversized clutch snaps to life the moment you push down on the pedal.
- No dead spots.
- No chatter.
- Just pure, direct drive.
Crafted from rock-hard 7075 aluminum and fitted with hybrid-ceramic bearings, it spins smoother and stays quieter than any hub you’ve tried before.
This thing is ready for that next-level phase you’ve been craving for.
And when you launch out of the gate, that instant engagement gives you a surge of confidence you can feel through every spoke.
If you race BMX, this isn’t just an upgrade.
It’s your ticket to cleaner starts, tighter control, and a whole new level of on-track focus.
Onyx Ultra ISO Rear Cassette HG Hub Review
1. Key Features Of The Onyx Ultra ISO Cassette Hub
Feel the difference before you even clip in.
This hub turns your pedal stroke into pure forward motion with zero hesitation.
Below are the standout details that make the Onyx Ultra ISO hub a cut above the rest.
- Instant engagement with a larger clutch assembly. No lag. Every pedal stroke snaps you forward.
- Silent coasting so you stay locked in on the track. Zero clicks. Zero distraction.
- 7075-T6 CNC-machined shell in anodized black. Light, tough, and built to last.
- Hybrid-ceramic bearings for ultra-smooth spin and minimal drag.
- Shimano Hyperglide driver style keeps your setup simple and reliable.
- 36-hole drilling fits standard 36-spoke rims for stiff, true wheels.
- 15 mm thru-axle compatibility (axle sold separately) for modern race frames.
- ISO 6-bolt rotor flange means easy disc brake setup.
- Made in the USA.
2. Onyx Ultra ISO Cassette HG Hub Specifications
Feel the craftsmanship in every millimeter.
This hub’s numbers tell the story of precision and performance.
I listed all the ins and outs of the Onyx Ultra ISO cassette HG hub’s tech details, so you know exactly what you’re getting.
- Shell material: CNC-machined 7075-T6 aluminum
- Engagement: Instant with oversized clutch assembly
- Coasting: Silent, no clicks or noise
- Bearings: Hybrid-ceramic for smooth spin
- Driver style: Shimano Hyperglide®
- Axle: 15 mm thru-axle (sold separately)
- Spoke count: 36 holes
- Flange: ISO 6-bolt disc
- Color: Black anodized finish
- Weight: 14.39 oz (408 g)
- Price: $485.00
3. How The Onyx Ultra ISO Rear Cassette HG Hub Rides
Right out of the box, the hub feels solid but light.
Mount it on the bike and feel how every watt of your effort locks into the track.
The moment you crank down, that oversized clutch grabs instantly, so there’s zero lag between your leg power and forward motion.
It’s like flicking a switch – what you pedal is exactly what you get, whether you’re launching off the gate or powering out of the first turn.
The hybrid‑ceramic bearings keep the spin buttery smooth, so you stay in control all the way to the finish line.
Slippery berms and technical doubles will never be an issue!
Even under repeated hard sprints, the alloy shell stays stiff, and you never feel the hub flex or slow.
It rides like a teammate you trust 110% – always ready, always precise, and never stealing energy from your heavy cranking.
GET YOUR ONYX ULTRA ISO CASSETTE HUB NOW4. Real Rider Testimonials
- Jake M.: “Off the gate feels electric. I’ve shaved 0.15 seconds on my 250 m starts since switching, and every sprint feels locked in.”
- Maria C.: “With no hub chatter, my focus stays on the track. I breeze through technical turns without that annoying click in my ear.”
- Tony R.: “After laps in muddy, wet conditions, the bearings still spin like day one. No grit buildup, no extra drag.”
- Sam W.: “That instant engagement feels like a higher force is pushing me forward. I hit berms with confidence and exit them faster every lap.”
5. Potential Cons of the Onyx Ultra ISO Cassette HG Hub
- Pricey at $485. Top-tier performance comes at a premium.
- Axle and bolts sold separately, so factor extra cost for a complete build.
- Black anodized finish can show scratches if you swap wheels often.
- Shimano HG driver only – not compatible with SRAM XD or other freehub bodies.
6. Who The Onyx Ultra ISO Rear Cassette HG Hub Is Best For
- Serious BMX racers chasing every millisecond at the start.
- Adult riders who push high torque in sprints and need a robust clutch.
- Disc-brake setups looking for a clean ISO-bolt solution.
- Anyone upgrading from noisy, slow-engaging hubs to ceramic-bearing speed.
Conclusion: Should You Get The Onyx Ultra ISO Rear Cassette HG Hub?
I mean, if you race BMX and crave instant power transfer, silent coasting, and bullet-proof bearings, the Onyx Ultra ISO hub is worth every penny.
It’s a high-end piece that lives up to its promise: instant drive, smooth spin, and rock-solid build.
You’ve seen how every detail of the Onyx Ultra ISO hub is built for one thing: winning races.
From the moment you roll to the gate, you know there won’t be a single millisecond wasted.
That confidence carries you through the first pedal stroke, and by the time you’re halfway down the first straight, you feel the difference:
- more grip on the track,
- more drive through each spoke,
- and more control in every corner.
Sure, it’s an investment, but think of it as betting on yourself.
You’re paying for engineering that won’t let you down when it counts.
If you’re done settling for hubs that lag, click, or wear out too fast, this is the upgrade you’ve been waiting for.
Fit it to your race machine, and enjoy the razor-sharp feeling in every sprint, every launch, and every brake-to-turn transition.
You’ll notice it in your lap times, and your rivals will notice it on the podium.
Don’t just improve your wheelset.
Boost your entire race experience.
Grab the Onyx Ultra ISO cassette HG hub, pin your number on, and let your riding speak for itself.
GET YOUR ONYX ULTRA ISO CASSETTE HUB NOWNeed more upgrades for your BMX racing machine:
- Syndyt SYB BMX race frame
- Box Three cranks or Box Two Vector M30-P cranks
- Answer Dagger carbon fork
- HT X2-SX clipless BMX pedals or Wolf Tooth Components Ripsaw pedals
- S&M Race XLT bars
