Shimano Alfine DH-S501 Dynamo Front Disc Hub Description:

Shimano Alfine Dynamo Front Hubs provide sufficient power for dynamo-operated bike accessories such as lights. 

Features:

• Compatible with 26 to 28″ wheel sizes
• Light alloy QR lever and nut
• 6V, 3.0W output
• Centerlock rotor mount
• Rotor lockring not included

Specifications:

• Position: Front
• Brake Type: Rim Brake, Disc Brake (Centerlock)
• Axle Type: Quick Release
• Hub Spacing: QR x 100mm
• Spoke Count: 32H, 36H
• Spoke Type: J-Bend
• Left Side Flange Diameter: 70mm
• Right Side Flange Diameter: 70mm
• Left Side Center to Flange: 20mm
• Right Side Center to Flange: 28.5mm
• Bearing Type: –
• Color: Black
• Weight: 575g (32H), 635g (36H)

This product is expected to become available for purchase on Friday, March 13, 2026