ALFINE INTERNAL GEARED HUB FOR DISC BRAKE USE (8-SPEED)

Discover ALFINE Di2, a stylish and sophisticated way to enjoy the ultimate urban riding experience.
  • pretty_bullet.png Internal geared Hub for Di2 electronic specification
  • pretty_bullet.png Wider gear ratio with more lighter weight
  • pretty_bullet.png Gear ratio: 409% (8-speed: 306%)
  • pretty_bullet.png Silent clutch
  • pretty_bullet.png Gear change support mechanism
  • pretty_bullet.png Longer durability by oil lubricant 1,665g (8-speed: 1,680g)
  • pretty_bullet.png Weight: 1,665g (8-speed: 1,680g)
  • pretty_bullet.png Color options: Piano black, Silver

Product Specs

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Model Number SG-S505
Series ALFINE
Speeds 8
Shifting Lever ST-S705-R
Disc Brake Rotor Mount Center Lock
Gear Ratio Total Difference 307%
Gear Ratio 1 0.527
Gear Ratio 2 0.644
Gear Ratio 3 0.748
Gear Ratio 4 0.851
Gear Ratio 5 1
Gear Ratio 6 1.223
Gear Ratio 7 1.419
Gear Ratio 8 1.615
Axle Length 187mm
Over Locknut 135
Spoke Holes 36H, 32H
Spoke Size #13, #14
Sprocket Options CS-S500: 18,20/ SM-GEAR inward:18,19,20,21,22,23/SM-GEAR outward: 16,18,19,20,21,22,23
Chain Line 41.8/47.7
Average Weight 1,680g
Flange Distance (mm) 57.3
Spoke Hole PCD (mm) 92.6
Flange Diameter (mm) 104.3
Flange Width (mm) 3.2
Sprocket Thickness (mm) CS-S500 2.0/ SM-GEAR 2.3
Shimano Recommended Chain CN-HG73/53/50
Dishing Distance (mm) 3.15
Shifting Switch SW-S705
Motor Unit MU-S705
Note Color option :Black, Silver