Shimano 105 HB-R7070 100mm Front hub

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Hub Data
Manufacturer Shimano
Model 105 HB-R7070
Descriptor Front Hub for Disc Brake (12 mm E-THRU, 100 mm O.L.D.)
Position Front
Axle Type 12mm thru
OLN 100 mm
Spoke Interface Type J-Bend
Brake Compatibility disc, Centerlock
Drive Interface n/a (front)
Internal Gearing none
Dynamo Type none
Spoke Hole Diameter 2.6 mm
Left Flange Diameter 44 mm
Right Flange Diameter 44 mm
Left Flange Offset 22.3 mm
Right Flange Offset 34.3 mm
Mid-Flange Offset 6 mm (to the right)
Weight 165 g
Hub ID 459
Record Status Public
Created Mar 16, 2019 12:27am
Contributed By dswenson
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
User contrib. Flange spacings have been adjusted. -Karl
3/16/2021 -- Checked dims on a used specimen during a wheel rebuild. Values are good! (actual flange thickness is about 3.2mm at the PCD; published flange spacing of 59.6mm is indeed outside-to-outside flange spacing) -Karl
part image