Shimano Alfine S7001-8 Internal Gear Hub

• Internal geared hub for disc brake. 8-speed
• Double Roller Clutch engagement for smoother, quieter shifting
• Top Normal structure adopted for more sporty cycling. Increased tolerance for shifting while riding uphill and under heavy loads
• Gear ratio 306
• O.L.D. 135mm
• Spoke size: #13/#14
• 32H/36H
• Center Lock rotor mount
• Axle length: 187mm
• Weight: 1670g