Upgrade your bike' rear wheel performance with this 3/8" x 185mm Rear Bicycle Axle Spindle Kit, designed for strength, smoothness, and durability. Featuring a heat-treated chromoly steel axle, this heavy-duty kit includes premium 6000RS sealed bearings and reinforced bearing cups, ensuring long-lasting performance under the most demanding riding conditions. Compatible with MTB, BMX, hybrid, cruisers, tandem, and variable speed bikes, this complete set is ideal for riders seeking improved pedaling efficiency, reduced friction, and reliable wheel support. Whether you're commuting, racing, or hitting the trails, this axle kit delivers consistent perfomance and easy installation.