Smooth is Fast.

This deeper profile design helps you combine three crucial performance elements: riding smooth, fast, and hard. Featuring a hookless 25mm internal width to handle the bigger tire you have had your eye on, all at a scant weight of 1323 grams. Hand-built with G-Spokes w/ Ride Smooth Technology, these wheels ride like butter.

The G-Spoke was designed to substantially reduce vibrations and increase tensile strength by almost 20% compared to steel spokes from real-world testing. Reducing vibrations has been largely known to increase traction, reduce body fatigue, and increase confidence and comfort.

Can these be used as road wheels? Of course. Remember, these are tubeless only(hookless) rims, so don’t run 100psi in these bad boys. The recommended tire size is 28C-50C.

Hand-built in Brevard, NC. Tubeless only. Lifetime Warranty30-day money-back guarantee.

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GGA 38

gravel aero



  • 30 day returns
  • Free shipping
  • Secure checkout
  • Limited lifetime warranty
GGA 38 int ext rim


  • Spoke count:  24
  • 3.1 grams/spoke
  • Made-in-USA


  • Wheelset: 1323 grams
  • Front:  608 grams
  • Rear:  715grams


  • Gulo Carbon Rims.
  • Hookless | Tubeless only
  • Internal rim width: 25mm internal width
  • External rim width: 32mm external width
  • Rim depth: 38mm deep
  • 700c

Tire Width

  • Recommended Tire Width 28C-50C


  • Gulo ETI System Boost (110/148)
  • Center lock disc-only
  • 48pts/7.5° engagement

Driver options

  • Campagnolo 11s
  • Campagnolo N3W
  • Shimano HG

Axle Front

  • 12X100
  • 15X100
  • QRX100

Axle Rear

  • 12X142
  • QRX135

Hub Finish

  • Black
  • Oil Slick

Spoke Ferrule Color

  • Silver

Comes With

  • Rim tape and valves installed

All our wheels ship for FREE.

All orders are processed within 5 to 7 business days (excluding weekends and holidays) after receiving your order confirmation email. You will receive another notification when your order has shipped.


3 reviews for GGA 38

  1. Nina Machnowski

    These wheels are the future of gravel racing. Ultralight, aerodynamic, and can take a beating! Love how wide the rims are, so they can fit a fatter tire like a 45! Great wheels all around and the new oil slick hubs are bling!!

  2. Bryan Glover (verified owner)

    About 1500 miles into my Gulo experience and I’ve been shocked from the very beginning at just how good these are! In a back to back comparison with my trusty rusty ENVE SES AR’s they made the ENVE’s feel like a pool noodle. The Gulo’s are noticeably stiffer/more stable in the lateral and longitudinal planes – especially when out of the saddle climbing or under hard braking – yet somehow also the smoothest and most comfortable wheels i’ve ever ridden. They seem to magically iron out every ounce of chatter on the road. I’m running them paired with 38c tires and the wide rim creates a perfect aero profile that most can’t achieve with a gravel setup. I’m completely sold on the woven carbon spoke technology and it’s obvious they’ve put in a ton of R&D. I don’t think I could go back after having ridden these!

  3. John Murphy

    These wheels ride like the ultimate gravel wheel. The 38mm deep carbon rim rides like a dream when paired up with a 42m tire. So even when you hit the pavement, they roll super fast. These wheels seem to pick up speed when they hit gravel roads and at the same time absorb a large amount of vibrations from rough roads.

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