Shimano Nexus Inter-8 132.5mm Rear hub

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Hub Data
Manufacturer Shimano
Model Nexus Inter-8
Descriptor 8spd internal
Position Rear
Axle Type 3/8" (9.5mm)
OLN 132.5 mm
Spoke Interface Type J-Bend
Brake Compatibility Roller brake
Drive Interface single cog driver
Internal Gearing 8 speed
Dynamo Type none
Spoke Hole Diameter 2.6 mm
Left Flange Diameter 92.6 mm
Right Flange Diameter 92.6 mm
Left Flange Offset 29.3 mm
Right Flange Offset 24.5 mm
Mid-Flange Offset -2.4 mm (to the left)
Weight 1630 g
Hub ID 168
Record Status Public
Created Feb 12, 2010 10:30am
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
(from Spocalc)

NOTE: these dimensions (especially the flange offsets) have not been verified, and several variations can be found on the internet. Someone should measure an actual hub and report back.

10/22/12 -- Dimensions verified on a new SG-8R36 and a new SG-8C31. Both were extremely close to the original numbers, so I didn't change anything. -Karl
part image