Shimano RS400 32H Black Front Bicycle Hub – Durable & Lightweight

The Shimano HB-RS400 Front Hub is engineered to deliver exceptional performance and longevity for road cyclists and mountain bikers alike. Designed with precision in mind, its cone races are meticulously ground using advanced Cubic Boron Nitride (CBN) tools to ensure ultra-smooth rotation and resistance to wear over time—even during high-mileage rides or rugged terrain adventures. This hub is Shimano-approved for radial spoke lacing setups, offering a sleek aesthetic while enhancing wheel stiffness and pedaling efficiency for competitive cyclists or those seeking a responsive ride.

Built for reliability under pressure, the HB-RS400 features an internal grease retention system with integrated O-rings and a grease sleeve that locks in lubrication longer than conventional designs. This minimizes friction buildup and extends service intervals, making it perfect for daily commuters or endurance riders who prioritize low-maintenance performance without sacrificing strength. Compatible with standard J-Bend spokes (32-hole drilling), it seamlessly integrates into custom wheel builds or upgrades for rim brake setups on 100mm QR axle frames.

Whether tackling steep trails or long-distance road tours, this hub provides consistent rotation under load thanks to its durable construction and precise engineering. Its black finish not only complements modern bike builds but also resists corrosion in wet conditions—a key advantage for all-weather riding enthusiasts.

Comparison Table: HB-RS400 vs Leading Competitors
| Feature | Shimano HB-RS400 | SRAM NX Hub | DT Swiss 240s Hub |
|————————–|—————————|———————-|————————-|
| Cone Race Technology | CBN-ground (smoother roll) | Standard machining | Ceramic bearings |
| Spoke Compatibility | J-Bend + Radial Lacing | Straight-pull only | J-Bend only |
| Grease Retention System | Dual O-ring + Sleeve | Single O-ring | External seals |
| Axle Type | QR 100mm | Boost 110mm | QR 100mm |
| Service Life | Extended (low friction) | Moderate | High (ceramic bearings) |

Ideal for riders seeking a balance of durability and ease of maintenance without compromising on performance, the HB-RS400 excels in both casual weekend rides and structured training sessions.