Shimano 600 FH-6401 130mm Rear hub

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Hub Data
Manufacturer Shimano
Model 600 FH-6401
Position Rear
Axle Type 10mm
OLN 130 mm
Spoke Interface Type J-Bend
Brake Compatibility rim brake
Drive Interface Shimano 8/9/10/DynaSys (34.95mm)
Internal Gearing none
Dynamo Type none
Spoke Hole Diameter 2.6 mm
Left Flange Diameter 45 mm
Right Flange Diameter 45 mm
Left Flange Offset 35 mm
Right Flange Offset 19 mm
Mid-Flange Offset -8 mm (to the left)
Weight 0 g
Hub ID 424
Record Status Public - attention required
Created Dec 19, 2018 7:14pm
Contributed By gx1400
hub dimension diagram
PLEASE NOTE: Shimano publishes hub dimensions in a relatively confusing manner on They seem to provide the outside-to-outside flange spacing, and an overall offset of the flanges as a whole. Wheelbuilders are interested in the distance from the midpoint between locknut faces to the middle of the flange (not the inside or outside face). When necessary, I convert Shimano's data into useful spoke calculation dimensions with some simple arithmetic, and factor in 3mm thick hub flanges (an approximation). The formula is to divide spacing by two, add or subtract the overall offset, then subtract half of our assumed 3mm flange thickness. Please check the notes to see if the values for this part are derived from Shimano's published data or actual measurements of a hub specimen. -Karl
Vintage road hub. Need to confirm freehub type (this would likely be 7spd era) and spacing. -Karl