New Mavic EX823 Disc Rim for Sale. The size is 26x32H which is 559x23 ETRTO comparable. C/w aluminium threaded eyelets and UST valve. Below is info from the manufacture… 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. Features: • Material: Maxtal, an aluminum alloy that is 30% more resistant than a 6106 alloy, for lighter and stronger rims. • Joint: Soudé Usiné Process (SUP). 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. • Drilling: Fore • Number of eyelets: 32. • Recommended tyre size: 2.30" to 3.00" • Valve hole diameter: 6.5mm. • Recommended nipple length: 16mm • Weight: 655 grams