Shimano Deore XT HB-T780 100mm Front hub

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Hub Data
Manufacturer Shimano
Model Deore XT HB-T780
Position Front
Axle Type 9mm
OLN 100 mm
Spoke Interface Type J-Bend
Brake Compatibility rim brake
Drive Interface n/a (front)
Internal Gearing none
Dynamo Type none
Spoke Hole Diameter 2.6 mm
Left Flange Diameter 40 mm
Right Flange Diameter 40 mm
Left Flange Offset 34.3 mm
Right Flange Offset 34.3 mm
Mid-Flange Offset 0 mm (centered)
Weight 153 g
Hub ID 481
Record Status Public
Created May 7, 2019 10:44am
Contributed By Pawel
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
Subtracted 1.5mm from submitted flange offsets to compensate for Shimano listing the outside-to-outside spacing instead of center-to-center spacing. -Karl
part image