The e*thirteen Flux Pro 66 GR Aluminum Rim - 28H, 27.5", Black is a premium, gravity-specific alloy rim featuring a welded 6069 aluminum construction. Combining an impact-absorbing 17mm low-profile shape, a 30mm inner width, and an agile 28-hole drilling, it redefines gravity performance by blending top-tier structural strength with fatigue-reducing terrain compliance.