Shimano Deore XT FH-M8110-B 148mm Rear hub

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Hub Data
Manufacturer Shimano
Model Deore XT FH-M8110-B
Position Rear
Axle Type 12mm thru
OLN 148 mm
Spoke Interface Type J-Bend
Brake Compatibility disc, Centerlock
Drive Interface Shimano Micro Spline (26mm)
Internal Gearing none
Dynamo Type none
Spoke Hole Diameter 2.5 mm
Left Flange Diameter 60 mm
Right Flange Diameter 61 mm
Left Flange Offset 36 mm
Right Flange Offset 22 mm
Mid-Flange Offset -7 mm (to the left)
Weight 304 g
Hub ID 534
Record Status Public
Created Aug 29, 2019 11:01am
Contributed By Karl Stoerzinger
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
8/29/19 -- New era of 12spd mountain hubs! Flange PCD and offsets measured by Karl on fresh specimen. (please read notes about Shimano published flange offsets confusingly) -Karl

Shimano Micro Spline dimensions: major diameter 32.5mm, minor dia 30mm. Each typical spline is about 1.9mm wide. Pattern is 24 equally-spaced splines with one spline offset fully into the gap position to make one double-wide spline and one double-wide gap. Freehub body is 26.0mm from reg face to flat end face. Splined extend all the way to the outer end, but disappear for the final 2mm before the reg face to simplify the machining processes needed to make the splines. Locknut to flange is 39.5mm on 12x148mm hub. -Karl
part image