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Mavic Ex 823 Disc 26" Rim

Item #: RI255A14
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Mavic Ex 823 Disc 26" Rim

Featuring Mavics most innovative technologies, such as SUP welding and Fore Drilling, EX 823 Disc is the only true UST rim available for downhillers and freeriders. Ridden by the most talented and aggressive of them, it has proven to be strong enough to withstand the worst abuses.
  • Maxtal: Exclusive to Mavic. An aluminum alloy that is 30% more resistant than a 6106 alloy, for lighter and stronger rims.
  • SUP: Soudé Usiné Process. After bending, the rim joint is arc welded. The welded seam is then milled for a smooth finish. A welded and milled rim joint is extremely strong, eliminates shuddering when braking, and offers superior wheel balance.
  • FORE: Only one of the 2 rim wall is "drilled." The rim is 4 times more resistant to fatigue stress - 20% increase in the rim rigidity to transfer all of your energy to the ground.
  • Aluminum threaded eyelets (supplied with the rim)
  • UST Tubeless or Clincher
  • Disc
  • ETRTO compatible size: 559 x 23
  • Recommended tire widths: 2.30 to 3.00
  • Valve hole diameter: 6.5 mm
  • Recommended nipple length: 16 mm
  • Do not use any rim tape

4.6 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Bombproof Rim
I've been running these rims on my DH bike for a couple years and they are still straight. I've taken some pretty hard landings in the past and overall I'm not a very smooth rider but these rims seem to take a beating and stay straight and without any flat spots.
These are a very good investment if you are looking for a bombproof wheel that you can abuse.
Overall very satisfied with this product and I would recommend to people. Can't beat Mavic quality!!

PROS: Strong, Stiff, Durable

BEST USES: Freeride, DH
March 16, 2012
My favourite!
I'm a tubeless fan and finding a UST rim for DH is limited. I've been running these rims for years. They are expensive, heavy and sometimes burp at the park but they are strong enough to last me a couple seasons - and they're tubeless!
February 23, 2012
Kelowna, BC
Buy the insert tool!
Buy the insert tool Mavic part # M40630! If you get the PARK SW 12, get the Mavic tool as well. The Park tool works well for final torquing, but cannot be spun between spokes. There are 72 inserts in a 36 spoke build and 18 threads on each insert. If you are using the Park tool, it must be removed and replaced over 4000 times for one build.

PROS: Durable, 36 Hole Tubeless

CONS: Inserts, Difficult To Install

BEST USES: Tandem Mountain, Downhill
April 20, 2014
Great, tough rim
Even though these can be a bit heavy for trail riding, these rims are bomb-proof! I've used these for years at the bike park and they have stayed perfectly true. I'm not a heavy dude but I can be a hack! I also love tubeless so here you don't have to mess with strips or conversion kits - beautiful.
October 31, 2012
Rifle, CO
Good Rim
I am a fairly hard rider and did quite a bit a research before I built my wheels, and this was the rim to buy. I have had the wheels for about 6 months now and haven't had to retrue them (done my fair share of hard landings too) worth it if you want something durable.

PROS: Easy To Install, Durable
March 26, 2013
Hesperia, CA
Great rim
Great rim. It's super strong and not that heavy. Running tubeless is easy with these rims

PROS: Super Strong Rim
September 5, 2012
Valve Stems Too Short
The UST valve stems that are provided with these rims are too short. I was able to get about one thread of engagement with the nut that secures them to the rim. There wasn't enough length of the stem protruding past the nut for me to use either my Park floor pump or my hand pump on the stems. I had to use a standard Presta/Schrader adapter instead. The Schrader adapters included with the valve stems did not work with my air compressor because the tip of the valve stem was too far down in the hole to touch the center of air nozzle on my compressor. I ended up buying a set of Stan's NoTubes 44mm valves.

The spoke length calculator on Mavic's website told me to use the wrong length of spoke. I built these rims up with 36h Hope Evo Pro II hubs, and the calculator came up with 254mm. This length was about 2mm too short for use with standard 12mm nipples, but they recommend using 16mm nipples, which add about 2.3mm to the overall length of the spoke. I ended up using 250mm spokes, which are a full 4mm shorter than what the spoke length calculator said.

Do use 16mm nipples, as the spoke wrench will not be able to fully engage the square drive section of 12mm nipples, preventing you from being able to tighten the spokes adequately.

The rims come with the UST spoke eyelets, but you will have to buy the M40630 eyelet tool separately.

These rims are very nice and rigid, and I like not having to use a tubeless rim strip.
October 29, 2013
Yuba City, CA

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Free Shipping Offer

Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.