Shimano Nexus SG-3R40 Rear Hub 3S Roller Brake 127/176.8mm

This rear hub from Shimano is a simple and durable 3-speed Nexus internal gear hub designed for everyday city bikes and low-maintenance commuting. The SG-3R40 features protected internal gearing to ensure consistent shifting in wet weather, while the Rollerbrake interface makes it a practical choice for bikes that utilize Shimano’s enclosed braking system. With an aluminum shell, 36-hole drilling, and a solid axle design, it’s a reliable option for rebuilding a wheel or replacing a worn hub on a utility bike.

- 3-speed internal gearing for low-maintenance city and commuter bikes
- Rollerbrake compatible hub for clean enclosed braking setups
- Aluminum hub shell keeps the build durable while remaining reasonably light
- 36-hole drilling suits common city bike wheel builds
- Solid axle design for dependable everyday use and stability
- Protected internal gears help reduce wear from weather and road dirt
- Excellent replacement hub for utility bikes and daily transport riding
- Supplied as hub only for custom wheel builds and service jobs

Specifications
Brand: Shimano
Model: SG-3R40
Series: Nexus
Type: Gear hub
Gear system: Nexus internal
Shifter Compatibility: Shimano Nexus 3-speed shifters
Gears: 3
Axle Type: Solid axle
Axle Length: 176.8 mm
Brake Interface: Rollerbrake mount
Brake Type Compatibility: Shimano Rollerbrake
Weight: 877 g
Material: Aluminum
Color: Silver