Shimano XTR HB-M976, Zee HB-M640 110mm Front hub

Add this hub to your bench

Hub Data
Manufacturer Shimano
Model XTR HB-M976, Zee HB-M640
Position Front
Axle Type 20mm thru
OLN 110 mm
Spoke Interface Type J-Bend
Brake Compatibility disc, Centerlock
Drive Interface n/a (front)
Internal Gearing none
Dynamo Type none
Spoke Hole Diameter 2.5 mm
Left Flange Diameter 52 mm
Right Flange Diameter 52 mm
Left Flange Offset 23 mm
Right Flange Offset 35 mm
Mid-Flange Offset 6 mm (to the right)
Weight 0 g
Hub ID 114
Record Status Public
Created Feb 10, 2010 11:47pm
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 2010 QBP catalog)
4=24=16 -- Also matches dimensions of Zee M640 front hub. -Karl