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  • Description

    Whether you're racing a time trial or triathlon, your equipment can make the difference between 1st and 5th. And the 321 Disc will save you more time than any other wheel. There's no lighter production disc wheel on the market, and none that has less drag.  In short, it's the fastest disc wheel in the known universe. Learn More

  • Tech Specs

    Assembly Method: Handmade

    Rim Width: 19mm internal, 27.3mm external (at brake track)

    Front Hub: Roval AF1/AFD1, CeramicSpeed Bearings

    Rear Hub: Roval Disc 142x12, CeramicSpeed bearings, DT Swiss 240 internals, 11-speed  Complete Specs Download Whitepaper PDF

  • Lifetime Warranty

    We got your back.  If you're the original purchaser, your Roval wheels are warrantied for as long as you own them.   If you're the subsequent owner (meaning that you're the second, or an even later, owner), then your Roval wheels are covered under warranty for two years from the date of the original retail purchase. Full Terms



Weight Matters

We used an ultra-light, single-layer of 1k carbon on each side, coming together at the brake track bridge. It delivers a supple ride and one of the lightest disc wheels available, so it'll spin-up quickly and reduce fatigue over the length of a course.

A Radical Shape

We made a revolutionary shape that, on the non-drive-side, is as aerodynamic as possible, with a drive-side shape that's as aerodynamic as the wheel-dish and derailleur clearance will allow for.

There's Such a Thing as Too Stiff

Our initial disc was so stiff that, under power, it wouldn't flex and caused brake rub. So we designed an optimal aero shape, first & foremost, and then created new stiffness targets to fit within a desirable frame stiffness. Now, it's the perfect balance.


The Most Aero Wheel Out There

Through hours of CFD and testing in the Win Tunnel, we developed a new shape that's optimized to work with a tire for on-bike airflow. This created off-the-charts aerodynamics that are as advanced as contemporary knowledge will allow for.

No Detail is Too Small

To save every possible watt, we've added CeramicSpeed bearings and DT Swiss 240 hub internals.


The 321 Disc is 2Bliss Ready and comes with a padded wheel bag, tubeless valve, and valve pocket covers. Rim brake model also includes quick-release and SwissStop Black Prince brake pads.

Tech Specs

Rim Type
Full carbon clincher, 2Bliss Ready
Rim Material
Braking Surface
Rim: Carbon Fiber
Disc: Disc brake only
Brake Track Height (Rim)
Rim Depth
Solid Disc
Rim Width
19mm internal, 27.3mm external (at brake track)
Rear Hub
Rim: Roval Disc, CeramicSpeed bearings, DT Swiss 240 internals, 11-speed
Disc: Roval Disc 142x12, CeramicSpeed bearings, DT Swiss 240 internals, 11-speed
Assembly Method
Roval padded wheel bag, Roval tubeless valve, Roval valve pocket covers, Roval steel quick-release (Rim only), SwissStop Black Prince brake pads (Rim only)
Rim: 1005g
Disc: 1015g

Custom Decals

Good news: We've partnered with STIKRD, which means that we're proud to introduce custom Roval decals. Our partnership started when we saw what these guys were doing, and how rad they were making bikes look with our wheels and custom decals. We know we're not alone in our love to make our bikes look rad, and STIKRD helps us do just that.

How does it work? Just follow the link over to and select the Roval wheelset that you have. Design your own decals, and then hang tight for a couple of days while they're printed and delivered to your doorstep. It’s that easy.

Design Now