Shimano FH-RS505 135mm Rear hub

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Hub Data
Manufacturer Shimano
Model FH-RS505
Position Rear
Axle Type 10mm
OLN 135 mm
Spoke Interface Type J-Bend
Brake Compatibility disc, Centerlock
Drive Interface Shimano 11 road (36.75mm)
Internal Gearing none
Dynamo Type none
Spoke Hole Diameter 2.6 mm
Left Flange Diameter 44 mm
Right Flange Diameter 45 mm
Left Flange Offset 34 mm
Right Flange Offset 17.5 mm
Mid-Flange Offset -8.3 mm (to the left)
Weight 378 g
Hub ID 488
Record Status Public - attention required
Created May 18, 2019 5:18am
Contributed By Tim W
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
Skewer weight 68g. 32 hole model weighed and measured, two samples were identical in weight.

Non series Tiagra level. Model is discontinued, Shimano road disc hubs are going to be 142x12 thru axle going forward.