Mavic Open Pro UST Disc Rim
The Mavic Open Pro is the road rim more hand-built wheels have been laced with than any other, and the Open Pro UST is its modern form: 19mm inside for today's 25 to 32mm tires, about 430 grams, machined between the spokes with Mavic's ISM4D process to trim weight, with black eyelets, a matte finish and a UST tubeless bed that seats a tire with a floor pump and seals without drama. It comes in rim-brake and disc versions, 24, 28 and 32 hole, and Mavic recommends tires from 28 to 47mm on the disc rim.
This page covers the Mavic Open Pro UST Disc Rim in 700c. The Open Pro UST is sold here only inside a wheel we build: choose the hub, spokes and nipples in the configurator and the finished wheel ships from Georgia, laced, tensioned and trued by hand.
Design and construction
UST is Mavic's tubeless standard, older than anyone else's, and the Open Pro UST bed is shaped to its tolerances: the tire bead drops into a well and pops onto a precise seat, which is why a UST rim seals with a floor pump when other rims need a compressor. The rim is a 25mm-deep, 19mm-inner double-wall extrusion with a welded SUP joint that is then milled flush, so the brake track on the rim-brake version is continuous, and the ISM4D milling removes material between the spoke holes where the rim carries no load. Eyelets are black to match the matte finish.
Standard nipples, J-bend spokes; the rim-brake version has Mavic's UB machined brake track, the disc version a plain sidewall.
How it rides
An Open Pro UST wheel rides like the Open Pro always has: smooth, light and dependable, now with a wider bed that makes a 28mm tire comfortable and a tubeless setup that actually works. It is the rim we suggest for a classic road build on a modern bike, a rim-brake bike that wants tubeless, or a disc road bike that wants an alloy wheel with a pedigree.
For a deeper alloy rim Mavic makes the CXP Pro; for a touring rim the A319. For an everyday road wheel, the Open Pro UST is the Mavic rim we recommend.
Specifications
| Wheel size | 700c |
|---|---|
| ERD | 598 (29in) |
| Inner width | 19 mm |
| Depth | 20 mm |
| Drillings | 24h, 28h, 32h |
| Weight | 420g (700c/29in) |
| Material | Aluminum |
| Tire type | clincher tubeless compatible |
| Brake | Disc |
| Nipples | External |
| Finishes | black |
This version
This version is the Open Pro UST in 700c, drilled 24h, 28h, 32h, about 420g, 19mm inside, 20mm deep, disc. Where the same rim is sold in another size or brake type, that is a separate listing with its own page.
The disc version of the Open Pro UST has no brake track, so the sidewall is a plain extrusion that saves a little weight and never wears; it is the one to choose for any disc-brake frame. The rim-brake version, listed separately, has a machined sidewall.
Sizes, fit and compatibility
The Mavic Open Pro UST Disc Rim comes in 700c and 24h, 28h, 32h drilling, in rim-brake and disc versions; check the name on this page. We build the Open Pro UST on DT Swiss 350, 240 and 180, Shimano, White Industries T11 and CLD, Chris King R45, Bitex and Hope RS4 hubs, usually with Sapim Race, Laser or CX-Ray spokes or DT Competition and Aerolite, and brass or alloy nipples.
Tire range on the Open Pro UST is 25 to 47mm. The configurator recommends spoke count and lacing from your bike type and weight.
Build it into a wheel
This rim is live in our Custom Wheel Program for gravel and road disc, track and road single-speed and touring builds. Start a build with the Mavic Open Pro UST Disc Rim and the configurator opens with this exact rim pinned at the top of the Mavic list — you choose the rest of the parts and it validates every combination as you go.
Spoke head is decided by the hub, not the rim: this rim builds equally well with J-bend or straight-pull spokes, and the configurator only offers the spokes that match the hub you pick.
How Mavic tests its rims
Mavic tests rims and wheels at its Competence Center in Chavanod, near Annecy, France: over 175 m2 for static tests and 360 m2 for dynamic tests, almost 47 tests in all. Mavic states its impact test follows UCI rules pushed to 150%; the wheel must not break or deform. Its climatic chamber cycles rims between +70°C and -10°C at 0 to 100% humidity over several days; the braking test runs 750 braking operations between 0 and 70 km/h; the hub torque test runs 100,000 cycles; the dancer bench simulates 500 km of climbing; front-end endurance covers 7,000 km at 70 km/h, plus field tests of 5,000 km (mountain) and 10,000 km (road). For the Comete 50, Mavic states 57 tests, frontal crash results 50% above UCI requirements, fatigue at 70 km/h under 120 kg equivalent to 700,000 km, and a 120 kg maximum load.
Mavic's warranty is two years; Mavic Care registration within 2 months extends wheels to three years, and registered carbon wheels from the 2021 range onward (serials CFA214xxx or CRA214xxx and above) are covered for life. Carbon crash replacement is 50% off in years 1 to 2, 40% in years 3 to 5 and 30% in years 6 to 8. Many Mavic wheels are UCI approved (dates 06.07.2016 to 19.09.2024).
Certifications
- UCI approved wheels — Mavic models listed on pages 42-43 of the UCI List of Approved Wheels since 01.01.2024 (version 2024.10.02); approval dates 06.07.2016 (Cosmic Carbone/Elite/Pro Carb/Ultimate, CXR, Ksyrium, R-SYS), 07.09.2018 (Cosmic Elite UST, Comete Pro Carbon SL), 29.06.2021 (Cosmic Pro Carbon UST, Cosmic Carbone SL/SLR, Ksyrium Pro Carbon UST, Comete Pro Carbon UST, Cosmic Ultimate), 28.07.2022 (Cosmic Ultimate 45 Disc), 30.04.2024 (Cosmic S 42 Disc), 16.08.2024 (Allroad SL Carbon Disc), 13.09.2024 (Cosmic SL 65/32/45 Disc, Cosmic S 40 RB), 19.09.2024 (Cosmic SLR 45 Disc 23mm) (source)
- In-house test lab — Mavic Competence Center, Chavanod near Annecy, France: over 175 m2 static tests, 360 m2 dynamic tests, almost 47 tests; impact test to UCI rules pushed to 150% (source)
- Warranty — 2 years from purchase; 3 years for wheels with Mavic Care registration within 2 months; carbon wheels from the 2021 range (serials CFA214xxx / CRA214xxx and above) guaranteed for life when registered; carbon crash replacement 50% / 40% / 30% discount at 0-2 / 3-5 / 6-8 years (source)
Sources on Mavic's site:
- Lab tests - Mavic
- Lab tests - Mavic (international)
- Warranty policy - Mavic
- Mavic Care / register your products (warranty and crash replacement)
- Comete 50 - Mavic
The figures, certificates and media above are Mavic's own. ProWheelBuilder does not run these tests; our part is the wheel we build on the rim.
Building it at ProWheelBuilder
Mavic makes the Open Pro UST; ProWheelBuilder is an independent wheel builder in Georgia, not the manufacturer. Spokes are cut from the ERD we measure on the actual rim, the wheel comes up in stages on a tensiometer, and it is stress-relieved and trued before it goes in the box; tape and a valve go on if you ask. UST tape and a valve are fitted on request.
The configurator filters to what fits, crosses out what is not made, and prices the build as you go.
Warranty
Manufacturer's warranty. Mavic warrants this product against defects in materials and workmanship. The duration, conditions and claim process are set by Mavic and can change without notice, so ask us and we will confirm the current terms before you buy.
ProWheelBuilder. Wheels we build around this part are covered by our own one-year warranty alongside the maker's. Within the year: broken spokes replaced regardless of cause, and the labor on the wheel - truing, re-tensioning or a complete rebuild - included. A manufacturer-covered rim or hub failure is a claim we make and manage for you; one they will not cover is answered with an eligible replacement at 25% off retail. Shipping each way is yours. Parts you supply yourself fall outside it.
Full terms are on our Policies & Warranty page.
Open Pro UST Disc Rim questions
What tire width suits this rim?
At 19mm inside this is a road width. It suits roughly 25 to 32mm tires, which is where most road bikes now sit, and it will run a 23 if you still want one. Go much wider than 32 on this rim and the tire starts to balloon above the sidewalls and squirm when you lean on it.
What does UST mean?
Universal System Tubeless, Mavic's tubeless standard; a UST rim bed is shaped so a tubeless tire seats with a floor pump and seals reliably.
What tires fit the Open Pro UST?
25 to 47mm on the disc version, 25 to 32mm on the rim-brake version. A 28mm tire is the pairing most of our customers run.
Is the Open Pro UST lighter than the old Open Pro?
About the same at 430 grams, with a much wider bed, a tubeless bed and ISM4D milling.
Rim brake or disc?
The rim-brake version has Mavic's machined UB brake track; the disc version has a plain sidewall. Pick the one that matches your bike.
Is ProWheelBuilder the manufacturer of the Mavic Open Pro UST Disc Rim?
No. Mavic makes the rim. ProWheelBuilder is an independent custom wheel builder in Georgia that builds it into a finished wheel to your spec.
Is it tubeless-ready?
Yes. Mavic lists the Open Pro UST Disc Rim as clincher tubeless compatible; we tape and fit a valve when you choose the tubeless option.
Not sure? Text or leave a voicemail on 470-253-0929 or email info@prowheelbuilder.com — you will be talking to the people who build the wheels.
