Shimano STX FH-MC30 Parallax 135mm Rear hub

Add this hub to your bench

Hub Data
Manufacturer Shimano
Model STX FH-MC30 Parallax
Position Rear
Axle Type 10mm
OLN 135 mm
Spoke Interface Type J-Bend
Brake Compatibility rim brake
Drive Interface Shimano 7 (30.9mm)
Internal Gearing none
Dynamo Type none
Spoke Hole Diameter 2.6 mm
Left Flange Diameter 45 mm
Right Flange Diameter 45 mm
Left Flange Offset 33.6 mm
Right Flange Offset 21.6 mm
Mid-Flange Offset -6 mm (to the left)
Weight 368 g
Hub ID 384
Record Status Public
Created Jun 11, 2018 5:48pm
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
1990s-era mountain-spaced 7spd cassette hub. Dims and weight from a well-used sample cut out of a wheel. -Karl
38.0mm locknut face to freehub shoulder.