Industry Nine Hydra2 BOOST Rear 6 Bolt Hubs
$890.00
Questions on fit, compatibility or stock? Our Auckland crew can help
✔ Online Exclusive.
✔ Buy Now – Delivery in 2 to 3 days
✖ Currently Out of Stock
✔ Buy Now to Backorder
✖ Currently Out of Stock
✔ Enquire Now to Backorder
✖ Currently Out of stock.
✔ In Store Pick Up Today
✔ Buy Now – Delivery in 2 to 3 days
Description and specifications
Description
Please advise Freehub (Hyperglide, Microspline or XD) and/or End Caps in order comments once your selected hub has been added to the cart.
Compatible End Caps – 12×148, QRx141
To make our most advanced trail, enduro, E-bike, and DH hub even better, we put durability at the forefront, systematically eliminating potential failure points using data gleaned from the 100,000+ Hydra hubs in use around the world.
The result is a hub that can shrug off extreme use by the most demanding riders. Here’s how we achieved it:
- A 65% thicker axle that’s been redesigned to dissipate stress more effectively.
- Larger 6903 bearings throughout, and a new labyrinth channel and full-contact radial lip seal to keep out elements that cause premature bearing wear.
- A new, foolproof design to ensure consistent bearing preload, regardless of variations in axle tightness.
- Larger, 5.5mm pawl pockets that dissipate force 26% better, preventing stretching and elongation of the pockets over years of use.
- Tougher metal for the drivering and an extra tooth on each pawl, guaranteeing Hydra2 can easily handle the torque of the most powerful ebike motors.
In our effort to make the Hydra2 hub bomb-proof, bullet-proof, and Brandon-proof, we didn’t compromise on meaningful performance gains, and the next generation has both quicker 0.41° engagement and 60% less coasting drag than its predecessor.
Combine I9’s trademark direct thread hubshell and machined aluminum spokes, and you’ve got a hub system with brains, brawn, and beauty — a piece of rideable art built by some of the most innovative engineering minds in the cycling industry.
For the next generation of riders, bikes, and trails that demand the very best, Hydra2 is the pinnacle of hub performance.
Technical specifications
- Weight - 292g
- Spoke Holes - 28 or 32
- Points of Engagement - 690
Frequently asked questions
Which freehub do I need - Hyperglide, Microspline or XD?
It depends on your cassette. Hyperglide (HG) covers 11-speed Shimano and SRAM’s 12-speed NX. Microspline is for Shimano 12-speed. XD is for SRAM Eagle 12-speed. Tell us which one in the order comments and we’ll fit it before it ships.
Worth knowing if you might change drivetrain later: HG and XD share the same end caps, but Microspline uses different ones. Swapping to or from Microspline means new end caps as well as a new freehub.
Will this fit my frame?
This one takes 12×148 Boost or QRx141 end caps, which covers most modern trail and enduro frames. If your frame is 12×142 non-Boost, or 12×157 Superboost, this isn’t the right hub – there are separate versions for those and we can point you at the correct one.
Getting this wrong is the easiest mistake to make when buying a rear hub. If you’re unsure, send us the make, model and year of your frame and we’ll confirm before you order.
Should I buy the Hydra2, or save money on the original Hydra?
The Hydra2 is the current generation. The original Hydra has been superseded and what’s left is run-out stock, so it’s less a question of which is better and more whether you want the current model or the last of the previous one.
What changed: a 65% thicker axle, larger 6903 bearings, bigger pawl pockets and an extra tooth on each pawl, all aimed at handling e-bike torque and hard use. Engagement improved too, 0.41 degrees against 0.52, though most riders won’t pick that on its own. Run-out Hydra stock is still a lot of hub for the money – but the Hydra2 is the one we’d buy to keep.
Should I choose 28 or 32 hole?
Let the rim decide. Follow the rim manufacturer’s guidance for whatever you’re lacing to, and if you’re rebuilding onto a rim you already own, match its hole count.
Don’t assume more spokes is automatically better – plenty of enduro wheelsets run 28 hole on purpose, for a more compliant wheel that tracks better on rough ground. Rear wheels do take more punishment than fronts, so if you’re genuinely torn and riding hard, 32 is the safer default. Tell us the rim and we’ll confirm before you order.
You may also like
Talk to the Outset team
Call +64 (09) 2804 450, email hello@outset.bike or visit us at 12 Carr Road, Three Kings, Auckland.