Gulo Composites Releases 'Triaxially Braided' Carbon G1 Spokes

Feb 26, 2021
by John Murphy  

PRESS RELEASE: Gulo Composites

Cutting edge technology combined with precise engineering, and hundreds of testing hours, the G1 Spoke was born. It is lightweight, impact-resistant and revolutionary in its design. We are no longer pushing the limits; we are creating new ones.

The Gulo Integrated System spoke is a triaxially braided composite, consisting of a blend of uniquely chosen materials for specific purposes. In the development of this spoke, two main goals were at the forefront: lightweight and impact resistance. The G1 spoke was formulated to absorb massive impacts without failing.

At the same time, it will retain tension much better and for much longer than traditional steel spokes at 40% of their mass. Hundreds of different spoke designs were manufactured and tested, and at the end of its development cycle, the G1 spoke remains one of the lightest spokes ever produced while achieving exceptional impact resistance.

bigquotesI wouldn’t have thought composite spokes would make a difference beyond weight, but they do. These are amazing wheels. I own and have ridden many other pairs of carbon wheels, but these are the most responsive, surest feeling wheels I’ve ridden. And the gold spoke ends are cool!John Koury, The Two Johns Podcast
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Gulo G1 Spoke

The G1 spoke starts out as multiple reels of fiber on in-house triaxial braiding machines. The types of fiber, orientation, fill content, and braid angles were all carefully evaluated then selected for specific attributes that contribute to the strength, resiliency, and ride quality of the G1 spoke. The finished spoke body is an exceptional example of design and functionality, from the highest quality molds of exacting tolerances to the custom resin system and curing cycle.


Gulo Ferrules, Hubs and Rims
The G1 spoke is not complete until fitted with aerospace-grade aluminum ferrules. The ferrules went through many renditions before they became the perfect balance of strength, weight, simplicity, and clean aesthetics that they are today. They serve to finish the G1 spoke into a clean and easy-to-build package.

The Gulo ETI (Easy Thread Interface) hubs serve as a platform for building their advanced wheel systems. The hubs feature a patented anti-bite freehub body, alternating 6 pawl drivers, and high-quality steel bearings. The hub shells are machined to extreme tolerances from super light 7075 aluminum alloy.

The final piece of the Gulo integrated wheel system is their molded rims which are constructed with a blend of premium Japanese Toray T700 and T800 carbon fiber. Straight out of the mold, the rims are in a finished state with a new permanent decal cured in place that will not peel chip or scratch like traditional sticker decals.


bigquotesI have been enjoying my PNF Enduro wheels. They track well and keep a good tire contact to the ground through tech DH and climbing. The carbon woven spokes are tough as nails. People get hesitant when they hear carbon spokes but these cut into a branch that got sucked into my wheel with no damage, wheel Tru.Tim Haggerty





Gulo Composites builds road, gravel, and mountain wheelsets. Their PNF Series offers three different mountain bike wheel systems: GMX-25, , GMD-27 and GME-30.

Visit Gulocomposites.com to learn more.




8 Comments

  • 8 0
 Looks like everyone is speechless.
  • 2 0
 How do they bond the end of the spokes? You can't thread carbon fiber. I would be suspect of laminate shear at the bonded nipple to the spoke.
Then again I can't afford uber wheels like this. Carry on.
  • 1 0
 These seem dope, though personally I don't have that many problems with broken spokes. I'd be super interested to see how they ride since they're so light. It's probably really important to make sure they don't twist when truing, if they ever do need to be trued too.
  • 2 2
 The weight on the wheelsets is pretty impressive, they're not that expensive really considering compared to other offerings. In theory carbon spokes could be pretty tough and good strength?
  • 2 3
 I'm not a fan of straight pull spokes, and, specifically, that has to do with the hub itself. I find that not having a flange that is braced by the spokes themselves allows for a great deal of deflection. Case in point: I was running DT 240 straight pull hub, carbon rim, and whenever I was in my highest 4 cogs, my rotor (which was perfectly true) would rub on my brake pads every revolution. As soon as I switched to a standard j bend spoke, this problem vanished. I've seen this on other bikes since making this discovery, and you will notice that straight pull hubs have very thick flanges, and this is to try to prevent the twisting that is typically prevented by j bend spokes supporting the hub flange all the way around.
While I think this kind of technology advancement is impressive, it would seem that quality steel j bend spokes still cannot be beat for strength to weight. Some things are best left unchanged.
  • 2 0
 The rotor mounting is in no way affected by the spoke mounting. It's not like the rotor attaches to the spokes.
  • 1 0
 Yeah I'm with @atestisthis on this. The spokes are inboard relative to the disc. The thing that determines whether or not the rotor will flex at all has to be something that flexes across the axis of the hub's rotation (i.e. thru-axle or the actual hub axle). So that'd be more of an issue of what your thru-axle threads into being to flexy. Even when I taco'd a wheel my brakes didn't really rub any more or get any more out of line.

But I am with you in that I prefer J-bend spokes for now. Cheaper and easier to get. Straight-pull spokes don't solve any problem I've ever experienced.
  • 1 0
 @conman1395: it wasn't the rotor flexing; it was the hub itself flexing. When the chain was in the highest two or three gears, that provided enough force to flex the entire hub shell enough so that the rotor would rub. It only needed to move a couple millimeters, so the leverage from the chain torquing the hub was enough to do it. It's the only explanation since the problem doesn't exist with standard j bend spokes.

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