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
URL	https://bike.shimano.com/en-EU/product/c...

Metadata
Hub ID	459
Record Status	Public
Created	Mar 16, 2019 12:27am
Contributed By	dswenson

PLEASE NOTE: Shimano publishes hub dimensions in a relatively confusing manner on bike.shimano.com. 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