In mountain biking's big-wheel battle of the '00s, Industry Nine
entered the fray with engineered answers to flex and weight issues. This
let the manufacturer rise to the top of the off-road market and led to
the development of the Ultralight CX Disc Wheelset.
One of its proven technologies applied to the wheelset is the 21mm internal width (25mm external), tubeless-compatible Ultralite mountain rim. The oversized extrusion is wider and deeper than traditional rims — for improved stiffness and better control that approaches carbon rims, but at a much lower cost. It features a tubeless-ready profile and includes tape and valves with a removable core for easy sealant application.
Laced to the rims are disc-specific Torch hubs, in a 2:1 pattern with Sapim spokes. As always, the artfully machined Torch hubset is built in North Carolina by people who ride hard. It's the same driver used in the mountain hubset but, to reduce drag, three pawls are used instead of six. On that same note, Industry Nine manufactures its own Teflon contact seals to defend against tenacious 'cross mud, while still remaining drag-free for stacking on gravel and road miles.
Unlike I9's mountain wheelsets, the CX makes use of Sapim's trusted CX-Ray stainless steel spokes. These forged, bladed spokes have a reputation as a strong, stiff option for securing a hub to a rim. Enhancing the strength is a 2:1 lacing pattern on the 24-spoke rear wheel, with eight of those spokes on the non-drive side, and 16 on the drive side. The result is reduced wind-up for phenomenal power transfer, but with the lightness that comes with reduced spoke counts.
Industry Nine recommends tires over 28mm wide for use with the Ultralight CX Disc Wheelset, and it sets a rider weight limit of 190lbs. The wheels are compatible with Shimano/SRAM 11-speed freehubs, and they come in a Black/black or Black/red finish and use six-bolt rotors.
- 3 pawl hubs with lightning-fast engagement
- 24-spoke wheels, laced in a 2-to-1 pattern
- 21mm internal rim width
- Compatible with 6-bolt rotors and Shimano/SRAM 11-speed cassettes
View more Clincher Wheels
Reviews & Community
Do these I9's really weigh in as advertised?
Are these compatible with a 12mm thru-axle for the front wheel?
Will these hubs accept an XD driver?
I asked the same question directly to I9 and here's the reply...
"At this time, the XD drivers are for the mtn wheels only but we do have intentions on releasing one for the road disc hubs in the future..."
I'm looking to add these to my gravel bike, but want the capability to run 25 or 28mm tires on the road. Could I mount up some 28's on these? If so, what kind of pressure (tubed) could I run?
The Ultralight CX Wheelset it best suited to be mounted with a 28 mm or wider tire although you could probably get away with a 25 mm. Your tire pressure will depend on your tires but somewhere in the 60-80 PSI range if you are riding road and gravel/dirt.
Feel free to shoot me any more questions or if you would like help setting up an order to outfit your gravel bike:
Are the hubs convertible? I need a 15x100mm through axle for the front and a 10x135mm QR on the back.
Yes they make interchangeable end caps for their wheels. If you can email me directly at email@example.com and I can assist with an order and get pricing all set up for you. Looking forward to chatting soon!
Do it all wheels
- Familiarity: I've put it through the wringer
Exceptional build quality, weight as advertised, tubeless rims set up very easy (with tubeless and standard bead cx tires) and handle very low pressures well, accelerate quick, the freewheel will let them know your coasting. Beautiful hubs and easy to service the pawls.
Buy them, support USA companies products.