aluminum alloy construction for durability and long service life. Versatility and compatibility: fits 24inch tires ranging from 5 to 2.125 inches in width, offering broad tire options. Multiple hole options: available in 24, 28, 32, or 36 holes to match hub and spoke configurations for performance. Doublelayer disc brake design: doublelayer rim structure provides enhanced braking performance and safety during rides. Use scenarios Mountain and trail riding: reliable rim strength and braking performance on mixed terrain, helping you handle descents with confidence. Wheel upgrades and : suitable for building or upgrading a 24inch wheelset with a range of tire widths and chosen spoke patterns. Spare rim for quick or seasonal cycling: flexible hole counts and strong construction support easy maintenance and longterm use.